Swift Package Index

Build Information

Failed to build MondrianLayout, reference main (b26eda), with Swift 6.3 for watchOS using Xcode 26.4 on 13 Apr 2026 08:45:16 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-26.4.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme MondrianLayout-Package -destination generic/platform=watchOS

Build Log

    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal armv7k /Users/admin/builder/spi-builder-workspace/MondrianLayout/MondrianNamespace.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal armv7k Compiling\ Edge.swift,\ LayoutBuilderContext.swift,\ Optimization.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/Edge.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/LayoutBuilderContext.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/Optimization.swift (in target 'MondrianLayout' from project 'MondrianLayout')
SwiftCompile normal armv7k /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/Edge.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal armv7k /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/LayoutBuilderContext.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal armv7k /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/Optimization.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal armv7k Compiling\ LayoutDescriptor.swift,\ MondrianArrayBuilder.swift,\ DimensionDescriptor.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/MondrianArrayBuilder.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift (in target 'MondrianLayout' from project 'MondrianLayout')
SwiftCompile normal armv7k /Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal armv7k /Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/MondrianArrayBuilder.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal armv7k /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftEmitModule normal armv7k Emitting\ module\ for\ MondrianLayout (in target 'MondrianLayout' from project 'MondrianLayout')
Failed frontend command:
/Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend -frontend -emit-module -experimental-skip-non-inlinable-function-bodies-without-types /Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/MondrianArrayBuilder.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/Edge.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/LayoutBuilderContext.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/Optimization.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/VHStackContentBuilder.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/_LayoutBlockNode.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/_LayoutBlockType.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/EntryPoint.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/NSLayoutConstraint+.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/UILayoutGuide+Mondrian.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/UIView+Mondrian.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/Utils.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/BackgroundBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/HStackBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/LayoutContainer.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/LayoutGuideBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/OverlayBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/RelativeBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/StackingSpacer.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/VGridBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/VStackBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ZStackBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Manager/LayoutManager.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/MondrianNamespace.swift -target armv7k-apple-watchos5.0 -load-resolved-plugin /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/usr/lib/swift/host/plugins/libFoundationMacros.dylib\#/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/usr/bin/swift-plugin-server\#FoundationMacros -load-resolved-plugin /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/usr/lib/swift/host/plugins/libObservationMacros.dylib\#/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/usr/bin/swift-plugin-server\#ObservationMacros -load-resolved-plugin /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/usr/lib/swift/host/plugins/libSwiftMacros.dylib\#/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/usr/bin/swift-plugin-server\#SwiftMacros -load-resolved-plugin /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/usr/lib/swift/host/plugins/libSwiftUIMacros.dylib\#/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/usr/bin/swift-plugin-server\#SwiftUIMacros -disable-implicit-swift-modules -Xcc -fno-implicit-modules -Xcc -fno-implicit-module-maps -explicit-swift-module-map-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/armv7k/MondrianLayout-dependencies-1.json -enable-objc-interop -sdk /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -I /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-watchos -Isystem /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-watchos -F /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/Library/Frameworks -F /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/Developer/Library/Frameworks -no-color-diagnostics -Xcc -fno-color-diagnostics -enable-testing -g -debug-info-format\=dwarf -dwarf-version\=4 -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SwiftExplicitPrecompiledModules -swift-version 5 -Onone -D SWIFT_PACKAGE -D DEBUG -D SWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -D Xcode -serialize-debugging-options -const-gather-protocols-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/armv7k/MondrianLayout_const_extract_protocols.json -enable-experimental-feature DebugDescriptionMacro -empty-abi-descriptor -validate-clang-modules-once -clang-build-session-file /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/Session.modulevalidation -Xcc -working-directory -Xcc /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode -enable-anonymous-context-mangled-names -file-compilation-dir /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode -Xcc -D_LIBCPP_HARDENING_MODE\=_LIBCPP_HARDENING_MODE_DEBUG -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/watchos26.4-23T238-688ef53f1462e2c8f657fdc38a81448f9e51884a582f42380855760c9d4cc599.sdkstatcache -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/swift-overrides.hmap -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-watchos/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/DerivedSources-normal/armv7k -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/DerivedSources/armv7k -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name MondrianLayout -frontend-parseable-output -disable-clang-spi -clang-target armv7k-apple-watchos26.4 -target-sdk-version 26.4 -target-sdk-name watchos26.4 -in-process-plugin-server-path /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/libSwiftInProcPluginServer.dylib -emit-module-doc-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/armv7k/MondrianLayout.swiftdoc -emit-module-source-info-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/armv7k/MondrianLayout.swiftsourceinfo -emit-objc-header-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/armv7k/MondrianLayout-Swift.h -serialize-diagnostics-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/armv7k/MondrianLayout-primary-emit-module.dia -emit-dependencies-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/armv7k/MondrianLayout-primary-emit-module.d -o /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/armv7k/MondrianLayout.swiftmodule -emit-abi-descriptor-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/armv7k/MondrianLayout.abi.json
EmitSwiftModule normal armv7k (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:16:41: error: 'NSLayoutConstraint' is unavailable in watchOS
  public private(set) var constraints: [NSLayoutConstraint]
                                        ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:19:19: error: 'NSLayoutConstraint' is unavailable in watchOS
    constraints: [NSLayoutConstraint]
                  ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:24:36: error: 'NSLayoutConstraint' is unavailable in watchOS
  public func append(_ constraint: NSLayoutConstraint) {
                                   ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:68:33: error: 'UIView' is unavailable in watchOS
  public static func to(_ view: UIView) -> LayoutDescriptorElement {
                                ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:72:40: error: 'UILayoutGuide' is unavailable in watchOS
  public static func to(_ layoutGuide: UILayoutGuide) -> LayoutDescriptorElement {
                                       ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:183:26: error: 'UILayoutPriority' is unavailable in watchOS
    public var priority: UILayoutPriority
                         ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:196:17: error: 'UILayoutPriority' is unavailable in watchOS
      priority: UILayoutPriority
                ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:204:58: error: 'UILayoutPriority' is unavailable in watchOS
    public static func min(_ value: CGFloat, _ priority: UILayoutPriority = .required) -> Self {
                                                         ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:204:78: error: 'required' is unavailable in watchOS
    public static func min(_ value: CGFloat, _ priority: UILayoutPriority = .required) -> Self {
                                                                             ^~~~~~~~
UIKit.UILayoutPriority.required:3:21: note: 'required' has been explicitly marked unavailable here
  public static var required: UILayoutPriority { get }}
                    ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:209:60: error: 'UILayoutPriority' is unavailable in watchOS
    public static func exact(_ value: CGFloat, _ priority: UILayoutPriority = .required) -> Self
                                                           ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:209:80: error: 'required' is unavailable in watchOS
    public static func exact(_ value: CGFloat, _ priority: UILayoutPriority = .required) -> Self
                                                                               ^~~~~~~~
UIKit.UILayoutPriority.required:3:21: note: 'required' has been explicitly marked unavailable here
  public static var required: UILayoutPriority { get }}
                    ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:215:58: error: 'UILayoutPriority' is unavailable in watchOS
    public static func max(_ value: CGFloat, _ priority: UILayoutPriority = .required) -> Self {
                                                         ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:215:78: error: 'required' is unavailable in watchOS
    public static func max(_ value: CGFloat, _ priority: UILayoutPriority = .required) -> Self {
                                                                             ^~~~~~~~
UIKit.UILayoutPriority.required:3:21: note: 'required' has been explicitly marked unavailable here
  public static var required: UILayoutPriority { get }}
                    ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:224:11: error: 'UIView' is unavailable in watchOS
    view: UIView
          ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:231:18: error: 'UILayoutGuide' is unavailable in watchOS
    layoutGuide: UILayoutGuide
                 ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:257:37: error: 'NSLayoutConstraint' is unavailable in watchOS
  private var proposedConstraints: [NSLayoutConstraint] = []
                                    ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:271:52: error: 'NSLayoutConstraint' is unavailable in watchOS
    _ closure: (_LayoutElement, _LayoutElement) -> NSLayoutConstraint
                                                   ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:272:8: error: 'NSLayoutConstraint' is unavailable in watchOS
  ) -> NSLayoutConstraint? {
       ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:289:53: error: 'NSLayoutConstraint' is unavailable in watchOS
    _ closure: (_LayoutElement, _LayoutElement) -> [NSLayoutConstraint]
                                                    ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:290:9: error: 'NSLayoutConstraint' is unavailable in watchOS
  ) -> [NSLayoutConstraint]? {
        ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:609:37: error: 'NSLayoutConstraint' is unavailable in watchOS
  public func makeConstraints() -> [NSLayoutConstraint] {
                                    ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:621:16: error: 'NSLayoutDimension' is unavailable in watchOS
    to anchor: NSLayoutDimension
               ^~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:81:12: note: 'NSLayoutDimension' has been explicitly marked unavailable here
@interface NSLayoutDimension : NSLayoutAnchor<NSLayoutDimension *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:622:8: error: 'NSLayoutConstraint' is unavailable in watchOS
  ) -> NSLayoutConstraint {
       ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:616:11: error: 'NSLayoutDimension' is unavailable in watchOS
extension NSLayoutDimension {
          ^~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:81:12: note: 'NSLayoutDimension' has been explicitly marked unavailable here
@interface NSLayoutDimension : NSLayoutAnchor<NSLayoutDimension *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:656:16: error: 'NSLayoutXAxisAnchor' is unavailable in watchOS
    to anchor: NSLayoutXAxisAnchor
               ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:64:12: note: 'NSLayoutXAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutXAxisAnchor : NSLayoutAnchor<NSLayoutXAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:657:8: error: 'NSLayoutConstraint' is unavailable in watchOS
  ) -> NSLayoutConstraint {
       ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:652:11: error: 'NSLayoutXAxisAnchor' is unavailable in watchOS
extension NSLayoutXAxisAnchor {
          ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:64:12: note: 'NSLayoutXAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutXAxisAnchor : NSLayoutAnchor<NSLayoutXAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:679:16: error: 'NSLayoutYAxisAnchor' is unavailable in watchOS
    to anchor: NSLayoutYAxisAnchor
               ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:72:12: note: 'NSLayoutYAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutYAxisAnchor : NSLayoutAnchor<NSLayoutYAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:680:8: error: 'NSLayoutConstraint' is unavailable in watchOS
  ) -> NSLayoutConstraint {
       ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:675:11: error: 'NSLayoutYAxisAnchor' is unavailable in watchOS
extension NSLayoutYAxisAnchor {
          ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:72:12: note: 'NSLayoutYAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutYAxisAnchor : NSLayoutAnchor<NSLayoutYAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:7:26: error: 'UILayoutPriority' is unavailable in watchOS
    public var priority: UILayoutPriority
                         ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:21:41: error: 'UIView' is unavailable in watchOS
  public func makeConstraints(for view: UIView) -> [NSLayoutConstraint] {
                                        ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:21:53: error: 'NSLayoutConstraint' is unavailable in watchOS
  public func makeConstraints(for view: UIView) -> [NSLayoutConstraint] {
                                                    ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:25:48: error: 'UILayoutGuide' is unavailable in watchOS
  public func makeConstraints(for layoutGuide: UILayoutGuide) -> [NSLayoutConstraint] {
                                               ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:25:67: error: 'NSLayoutConstraint' is unavailable in watchOS
  public func makeConstraints(for layoutGuide: UILayoutGuide) -> [NSLayoutConstraint] {
                                                                  ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:29:54: error: 'NSLayoutConstraint' is unavailable in watchOS
  func makeConstraints(for view: _LayoutElement) -> [NSLayoutConstraint] {
                                                     ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:112:55: error: 'UILayoutPriority' is unavailable in watchOS
  public func aspectRatio(_ ratio: CGFloat, priority: UILayoutPriority = .required) -> Self {
                                                      ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:112:75: error: 'required' is unavailable in watchOS
  public func aspectRatio(_ ratio: CGFloat, priority: UILayoutPriority = .required) -> Self {
                                                                          ^~~~~~~~
UIKit.UILayoutPriority.required:3:21: note: 'required' has been explicitly marked unavailable here
  public static var required: UILayoutPriority { get }}
                    ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:207:46: error: 'UILayoutPriority' is unavailable in watchOS
  public func size(_ size: CGSize, priority: UILayoutPriority = .required) -> Self {
                                             ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:207:66: error: 'required' is unavailable in watchOS
  public func size(_ size: CGSize, priority: UILayoutPriority = .required) -> Self {
                                                                 ^~~~~~~~
UIKit.UILayoutPriority.required:3:21: note: 'required' has been explicitly marked unavailable here
  public static var required: UILayoutPriority { get }}
                    ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:217:49: error: 'UILayoutPriority' is unavailable in watchOS
  public func size(_ length: CGFloat, priority: UILayoutPriority = .required) -> Self {
                                                ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:217:69: error: 'required' is unavailable in watchOS
  public func size(_ length: CGFloat, priority: UILayoutPriority = .required) -> Self {
                                                                    ^~~~~~~~
UIKit.UILayoutPriority.required:3:21: note: 'required' has been explicitly marked unavailable here
  public static var required: UILayoutPriority { get }}
                    ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/LayoutBuilderContext.swift:11:31: error: 'UIView' is unavailable in watchOS
  public weak var targetView: UIView?
                              ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/LayoutBuilderContext.swift:17:17: error: 'UIView' is unavailable in watchOS
    targetView: UIView
                ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/LayoutBuilderContext.swift:23:49: error: 'UILayoutGuide' is unavailable in watchOS
  public private(set) var managedLayoutGuides: [UILayoutGuide] = []
                                                ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/LayoutBuilderContext.swift:24:41: error: 'NSLayoutConstraint' is unavailable in watchOS
  public private(set) var constraints: [NSLayoutConstraint] = []
                                        ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/LayoutBuilderContext.swift:29:26: error: 'NSLayoutConstraint' is unavailable in watchOS
  func add(constraints: [NSLayoutConstraint]) {
                         ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/LayoutBuilderContext.swift:33:47: error: 'UILayoutGuide' is unavailable in watchOS
  func makeLayoutGuide(identifier: String) -> UILayoutGuide {
                                              ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/VHStackContentBuilder.swift:161:55: error: 'UILayoutGuide' is unavailable in watchOS
  public static func buildExpression(_ layoutGuides: [UILayoutGuide]...) -> [Component] {
                                                      ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/VHStackContentBuilder.swift:167:51: error: 'UILayoutGuide' is unavailable in watchOS
  public static func buildExpression<LayoutGuide: UILayoutGuide>(_ layoutGuide: LayoutGuide) -> [Component] {
                                                  ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/VHStackContentBuilder.swift:173:51: error: 'UILayoutGuide' is unavailable in watchOS
  public static func buildExpression<LayoutGuide: UILayoutGuide>(_ layoutGuide: LayoutGuide?) -> [Component] {
                                                  ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/VHStackContentBuilder.swift:178:48: error: 'UIView' is unavailable in watchOS
  public static func buildExpression(_ views: [UIView]...) -> [Component] {
                                               ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/VHStackContentBuilder.swift:184:44: error: 'UIView' is unavailable in watchOS
  public static func buildExpression<View: UIView>(_ view: View) -> [Component] {
                                           ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/VHStackContentBuilder.swift:190:44: error: 'UIView' is unavailable in watchOS
  public static func buildExpression<View: UIView>(_ view: View?) -> [Component] {
                                           ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/VHStackContentBuilder.swift:239:48: error: 'UIView' is unavailable in watchOS
  public static func buildExpression(_ views: [UIView]...) -> [Component] {
                                               ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/VHStackContentBuilder.swift:245:44: error: 'UIView' is unavailable in watchOS
  public static func buildExpression<View: UIView>(_ view: View) -> [Component] {
                                           ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/VHStackContentBuilder.swift:251:44: error: 'UIView' is unavailable in watchOS
  public static func buildExpression<View: UIView>(_ view: View?) -> [Component] {
                                           ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/_LayoutBlockNode.swift:38:34: error: 'UIView' is unavailable in watchOS
  public func background(_ view: UIView) -> BackgroundBlock {
                                 ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/_LayoutBlockNode.swift:46:31: error: 'UIView' is unavailable in watchOS
  public func overlay(_ view: UIView) -> OverlayBlock {
                              ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/EntryPoint.swift:61:14: error: 'UIView' is unavailable in watchOS
    on view: UIView,
             ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/NSLayoutConstraint+.swift:6:51: error: 'NSLayoutConstraint' is unavailable in watchOS
  func setInternalIdentifier(_ string: String) -> NSLayoutConstraint {
                                                  ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/NSLayoutConstraint+.swift:12:43: error: 'NSLayoutConstraint' is unavailable in watchOS
  func setIdentifier(_ string: String) -> NSLayoutConstraint {
                                          ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/NSLayoutConstraint+.swift:18:32: error: 'UILayoutPriority' is unavailable in watchOS
  func setPriority(_ priority: UILayoutPriority) -> NSLayoutConstraint {
                               ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/NSLayoutConstraint+.swift:18:53: error: 'NSLayoutConstraint' is unavailable in watchOS
  func setPriority(_ priority: UILayoutPriority) -> NSLayoutConstraint {
                                                    ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/NSLayoutConstraint+.swift:3:11: error: 'NSLayoutConstraint' is unavailable in watchOS
extension NSLayoutConstraint {
          ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/UILayoutGuide+Mondrian.swift:5:42: error: 'UILayoutGuide' is unavailable in watchOS
  public var mondrian: MondrianNamespace<UILayoutGuide> {
                                         ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/UILayoutGuide+Mondrian.swift:3:11: error: 'UILayoutGuide' is unavailable in watchOS
extension UILayoutGuide {
          ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/UIView+Mondrian.swift:37:42: error: 'UIView' is unavailable in watchOS
extension MondrianNamespace where Base : UIView {
                                         ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/UIView+Mondrian.swift:63:42: error: 'UIView' is unavailable in watchOS
  public var mondrian: MondrianNamespace<UIView> {
                                         ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/UIView+Mondrian.swift:61:11: error: 'UIView' is unavailable in watchOS
extension UIView {
          ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/UIView+Mondrian.swift:71:11: error: 'UIView' is unavailable in watchOS
extension UIView {
          ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:9:11: error: 'UIView' is unavailable in watchOS
extension UIView: __LayoutElementConvertible {
          ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:16:11: error: 'UILayoutGuide' is unavailable in watchOS
extension UILayoutGuide: __LayoutElementConvertible {
          ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:51:22: error: 'NSLayoutXAxisAnchor' is unavailable in watchOS
  let leadingAnchor: NSLayoutXAxisAnchor
                     ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:64:12: note: 'NSLayoutXAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutXAxisAnchor : NSLayoutAnchor<NSLayoutXAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:52:23: error: 'NSLayoutXAxisAnchor' is unavailable in watchOS
  let trailingAnchor: NSLayoutXAxisAnchor
                      ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:64:12: note: 'NSLayoutXAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutXAxisAnchor : NSLayoutAnchor<NSLayoutXAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:53:19: error: 'NSLayoutXAxisAnchor' is unavailable in watchOS
  let leftAnchor: NSLayoutXAxisAnchor
                  ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:64:12: note: 'NSLayoutXAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutXAxisAnchor : NSLayoutAnchor<NSLayoutXAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:54:20: error: 'NSLayoutXAxisAnchor' is unavailable in watchOS
  let rightAnchor: NSLayoutXAxisAnchor
                   ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:64:12: note: 'NSLayoutXAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutXAxisAnchor : NSLayoutAnchor<NSLayoutXAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:55:18: error: 'NSLayoutYAxisAnchor' is unavailable in watchOS
  let topAnchor: NSLayoutYAxisAnchor
                 ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:72:12: note: 'NSLayoutYAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutYAxisAnchor : NSLayoutAnchor<NSLayoutYAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:56:21: error: 'NSLayoutYAxisAnchor' is unavailable in watchOS
  let bottomAnchor: NSLayoutYAxisAnchor
                    ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:72:12: note: 'NSLayoutYAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutYAxisAnchor : NSLayoutAnchor<NSLayoutYAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:57:20: error: 'NSLayoutDimension' is unavailable in watchOS
  let widthAnchor: NSLayoutDimension
                   ^~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:81:12: note: 'NSLayoutDimension' has been explicitly marked unavailable here
@interface NSLayoutDimension : NSLayoutAnchor<NSLayoutDimension *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:58:21: error: 'NSLayoutDimension' is unavailable in watchOS
  let heightAnchor: NSLayoutDimension
                    ^~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:81:12: note: 'NSLayoutDimension' has been explicitly marked unavailable here
@interface NSLayoutDimension : NSLayoutAnchor<NSLayoutDimension *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:59:22: error: 'NSLayoutXAxisAnchor' is unavailable in watchOS
  let centerXAnchor: NSLayoutXAxisAnchor
                     ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:64:12: note: 'NSLayoutXAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutXAxisAnchor : NSLayoutAnchor<NSLayoutXAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:60:22: error: 'NSLayoutYAxisAnchor' is unavailable in watchOS
  let centerYAnchor: NSLayoutYAxisAnchor
                     ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:72:12: note: 'NSLayoutYAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutYAxisAnchor : NSLayoutAnchor<NSLayoutYAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:62:19: error: 'UIView' is unavailable in watchOS
  var owningView: UIView? {
                  ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:66:13: error: 'UIView' is unavailable in watchOS
  let view: UIView?
            ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:67:20: error: 'UILayoutGuide' is unavailable in watchOS
  let layoutGuide: UILayoutGuide?
                   ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:69:21: error: 'UIView' is unavailable in watchOS
  public init(view: UIView) {
                    ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:86:28: error: 'UILayoutGuide' is unavailable in watchOS
  public init(layoutGuide: UILayoutGuide) {
                           ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:104:39: error: 'NSLayoutXAxisAnchor' is unavailable in watchOS
  func anchor(_ type: XAxisAnchor) -> NSLayoutXAxisAnchor {
                                      ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:64:12: note: 'NSLayoutXAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutXAxisAnchor : NSLayoutAnchor<NSLayoutXAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:119:39: error: 'NSLayoutYAxisAnchor' is unavailable in watchOS
  func anchor(_ type: YAxisAnchor) -> NSLayoutYAxisAnchor {
                                      ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:72:12: note: 'NSLayoutYAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutYAxisAnchor : NSLayoutAnchor<NSLayoutYAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:130:43: error: 'NSLayoutDimension' is unavailable in watchOS
  func anchor(_ type: DimensionAnchor) -> NSLayoutDimension {
                                          ^~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:81:12: note: 'NSLayoutDimension' has been explicitly marked unavailable here
@interface NSLayoutDimension : NSLayoutAnchor<NSLayoutDimension *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/LayoutContainer.swift:63:33: error: 'UIView' is unavailable in watchOS
  func setupConstraints(parent: UIView, in context: LayoutBuilderContext) {
                                ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/LayoutGuideBlock.swift:13:27: error: 'UILayoutGuide' is unavailable in watchOS
  public let layoutGuide: UILayoutGuide
                          ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/LayoutGuideBlock.swift:18:20: error: 'UILayoutGuide' is unavailable in watchOS
    _ layoutGuide: UILayoutGuide
                   ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/LayoutGuideBlock.swift:23:61: error: 'NSLayoutConstraint' is unavailable in watchOS
  func makeConstraintsToEdge(_ element: _LayoutElement) -> [NSLayoutConstraint] {
                                                            ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/LayoutGuideBlock.swift:27:30: error: 'NSLayoutConstraint' is unavailable in watchOS
  func makeConstraints() -> [NSLayoutConstraint] {
                             ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/VGridBlock.swift:271:48: error: 'UIView' is unavailable in watchOS
  public static func buildExpression(_ views: [UIView]...) -> [Component] {
                                               ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/VGridBlock.swift:277:44: error: 'UIView' is unavailable in watchOS
  public static func buildExpression<View: UIView>(_ view: View) -> [Component] {
                                           ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/VGridBlock.swift:283:44: error: 'UIView' is unavailable in watchOS
  public static func buildExpression<View: UIView>(_ view: View?) -> [Component] {
                                           ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:26:20: error: 'UIView' is unavailable in watchOS
  public let view: UIView
                   ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:30:32: error: 'UILayoutPriority' is unavailable in watchOS
  var verticalHuggingPriority: UILayoutPriority?
                               ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:31:34: error: 'UILayoutPriority' is unavailable in watchOS
  var horizontalHuggingPriority: UILayoutPriority?
                                 ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:33:46: error: 'UILayoutPriority' is unavailable in watchOS
  var verticalCompressionResistancePriority: UILayoutPriority?
                                             ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:34:48: error: 'UILayoutPriority' is unavailable in watchOS
  var horizontalCompressionResistancePriority: UILayoutPriority?
                                               ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:37:13: error: 'UIView' is unavailable in watchOS
    _ view: UIView
            ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:50:17: error: 'UILayoutPriority' is unavailable in watchOS
    _ priority: UILayoutPriority = .required
                ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:50:37: error: 'required' is unavailable in watchOS
    _ priority: UILayoutPriority = .required
                                    ^~~~~~~~
UIKit.UILayoutPriority.required:3:21: note: 'required' has been explicitly marked unavailable here
  public static var required: UILayoutPriority { get }}
                    ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:64:17: error: 'UILayoutPriority' is unavailable in watchOS
    _ priority: UILayoutPriority = .required
                ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:64:37: error: 'required' is unavailable in watchOS
    _ priority: UILayoutPriority = .required
                                    ^~~~~~~~
UIKit.UILayoutPriority.required:3:21: note: 'required' has been explicitly marked unavailable here
  public static var required: UILayoutPriority { get }}
                    ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:76:61: error: 'NSLayoutConstraint' is unavailable in watchOS
  func makeConstraintsToEdge(_ element: _LayoutElement) -> [NSLayoutConstraint] {
                                                            ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:108:30: error: 'NSLayoutConstraint' is unavailable in watchOS
  func makeConstraints() -> [NSLayoutConstraint] {
                             ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ZStackBlock.swift:271:55: error: 'UILayoutGuide' is unavailable in watchOS
  public static func buildExpression(_ layoutGuides: [UILayoutGuide]...) -> [Component] {
                                                      ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ZStackBlock.swift:277:51: error: 'UILayoutGuide' is unavailable in watchOS
  public static func buildExpression<LayoutGuide: UILayoutGuide>(_ layoutGuide: LayoutGuide) -> [Component] {
                                                  ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ZStackBlock.swift:283:51: error: 'UILayoutGuide' is unavailable in watchOS
  public static func buildExpression<LayoutGuide: UILayoutGuide>(_ layoutGuide: LayoutGuide?) -> [Component] {
                                                  ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ZStackBlock.swift:288:48: error: 'UIView' is unavailable in watchOS
  public static func buildExpression(_ views: [UIView]...) -> [Component] {
                                               ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ZStackBlock.swift:294:44: error: 'UIView' is unavailable in watchOS
  public static func buildExpression<View: UIView>(_ view: View) -> [Component] {
                                           ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ZStackBlock.swift:300:44: error: 'UIView' is unavailable in watchOS
  public static func buildExpression<View: UIView>(_ view: View?) -> [Component] {
                                           ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Manager/LayoutManager.swift:31:32: error: 'UIView' is unavailable in watchOS
  private weak var targetView: UIView?
                               ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Manager/LayoutManager.swift:43:14: error: 'UIView' is unavailable in watchOS
    on view: UIView,
             ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/MondrianNamespace.swift:12:41: error: 'UIView' is unavailable in watchOS
extension MondrianNamespace where Base: UIView {
                                        ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/MondrianNamespace.swift:37:41: error: 'UILayoutGuide' is unavailable in watchOS
extension MondrianNamespace where Base: UILayoutGuide {
                                        ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
SwiftCompile normal armv7k Compiling\ LayoutGuideBlock.swift,\ OverlayBlock.swift,\ RelativeBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/LayoutGuideBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/OverlayBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/RelativeBlock.swift (in target 'MondrianLayout' from project 'MondrianLayout')
SwiftCompile normal armv7k /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/LayoutGuideBlock.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal armv7k /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/OverlayBlock.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal armv7k /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/RelativeBlock.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal armv7k Compiling\ EntryPoint.swift,\ NSLayoutConstraint+.swift,\ UILayoutGuide+Mondrian.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/EntryPoint.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/NSLayoutConstraint+.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/UILayoutGuide+Mondrian.swift (in target 'MondrianLayout' from project 'MondrianLayout')
SwiftCompile normal armv7k /Users/admin/builder/spi-builder-workspace/MondrianLayout/EntryPoint.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal armv7k /Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/NSLayoutConstraint+.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal armv7k /Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/UILayoutGuide+Mondrian.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal armv7k Compiling\ BackgroundBlock.swift,\ HStackBlock.swift,\ LayoutContainer.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/BackgroundBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/HStackBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/LayoutContainer.swift (in target 'MondrianLayout' from project 'MondrianLayout')
SwiftCompile normal armv7k /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/BackgroundBlock.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal armv7k /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/HStackBlock.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal armv7k /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/LayoutContainer.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftEmitModule normal arm64 Emitting\ module\ for\ MondrianLayout (in target 'MondrianLayout' from project 'MondrianLayout')
EmitSwiftModule normal arm64 (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

2026-04-13 04:45:02.681 xcodebuild[730:4300] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
** BUILD FAILED **
The following build commands failed:
	SwiftEmitModule normal armv7k Emitting\ module\ for\ MondrianLayout (in target 'MondrianLayout' from project 'MondrianLayout')
	EmitSwiftModule normal armv7k (in target 'MondrianLayout' from project 'MondrianLayout')
	Building workspace spi-builder-workspace with scheme MondrianLayout-Package
(3 failures)
Command line invocation:
    /Applications/Xcode-26.4.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Resolved source packages:
  MondrianLayout: /Users/admin/builder/spi-builder-workspace
resolved source packages: MondrianLayout
2026-04-13 04:45:12.619 xcodebuild[986:5493] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "MondrianLayout",
  "name" : "MondrianLayout",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "12.0"
    }
  ],
  "products" : [
    {
      "name" : "MondrianLayout",
      "targets" : [
        "MondrianLayout"
      ],
      "type" : {
        "library" : [
          "static"
        ]
      }
    },
    {
      "name" : "MondrianLayoutDynamic",
      "targets" : [
        "MondrianLayout"
      ],
      "type" : {
        "library" : [
          "dynamic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "MondrianLayout",
      "module_type" : "SwiftTarget",
      "name" : "MondrianLayout",
      "path" : "MondrianLayout",
      "product_memberships" : [
        "MondrianLayout",
        "MondrianLayoutDynamic"
      ],
      "sources" : [
        "Classic/LayoutDescriptor.swift",
        "Classic/MondrianArrayBuilder.swift",
        "Descriptors/DimensionDescriptor.swift",
        "Descriptors/Edge.swift",
        "Descriptors/LayoutBuilderContext.swift",
        "Descriptors/Optimization.swift",
        "Descriptors/VHStackContentBuilder.swift",
        "Descriptors/_LayoutBlockNode.swift",
        "Descriptors/_LayoutBlockType.swift",
        "EntryPoint.swift",
        "Extensions/NSLayoutConstraint+.swift",
        "Extensions/UILayoutGuide+Mondrian.swift",
        "Extensions/UIView+Mondrian.swift",
        "Internal/Utils.swift",
        "Internal/_LayoutElement.swift",
        "LayoutBlocks/BackgroundBlock.swift",
        "LayoutBlocks/HStackBlock.swift",
        "LayoutBlocks/LayoutContainer.swift",
        "LayoutBlocks/LayoutGuideBlock.swift",
        "LayoutBlocks/OverlayBlock.swift",
        "LayoutBlocks/RelativeBlock.swift",
        "LayoutBlocks/StackingSpacer.swift",
        "LayoutBlocks/VGridBlock.swift",
        "LayoutBlocks/VStackBlock.swift",
        "LayoutBlocks/ViewBlock.swift",
        "LayoutBlocks/ZStackBlock.swift",
        "Manager/LayoutManager.swift",
        "MondrianNamespace.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.3"
}
{
  "workspace" : {
    "name" : "spi-builder-workspace",
    "schemes" : [
      "MondrianLayout",
      "MondrianLayout-Package",
      "MondrianLayoutDynamic"
    ]
  }
}
2026-04-13 04:45:13.804 xcodebuild[996:5590] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-26.4.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme MondrianLayout-Package -destination generic/platform=watchOS
Command line invocation:
    /Applications/Xcode-26.4.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath /Users/admin/builder/spi-builder-workspace/.derivedData build -scheme MondrianLayout-Package -destination generic/platform=watchOS
Resolve Package Graph
Resolved source packages:
  MondrianLayout: /Users/admin/builder/spi-builder-workspace
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (3 targets)
    Target 'MondrianLayoutDynamic' in project 'MondrianLayout'
        ➜ Explicit dependency on target 'MondrianLayout' in project 'MondrianLayout'
    Target 'MondrianLayout' in project 'MondrianLayout'
        ➜ Explicit dependency on target 'MondrianLayout' in project 'MondrianLayout'
    Target 'MondrianLayout' in project 'MondrianLayout' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
ClangStatCache /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang-stat-cache /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/watchos26.4-23T238-688ef53f1462e2c8f657fdc38a81448f9e51884a582f42380855760c9d4cc599.sdkstatcache
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang-stat-cache /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -o /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/watchos26.4-23T238-688ef53f1462e2c8f657fdc38a81448f9e51884a582f42380855760c9d4cc599.sdkstatcache
SwiftDriver MondrianLayout normal arm64_32 com.apple.xcode.tools.swift.compiler (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-SwiftDriver -- /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc -module-name MondrianLayout -Onone @/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/arm64_32/MondrianLayout.SwiftFileList -DSWIFT_PACKAGE -DDEBUG -DSWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -DXcode -plugin-path /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins/testing -enable-experimental-feature DebugDescriptionMacro -sdk /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -target arm64_32-apple-watchos5.0 -g -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -Xfrontend -serialize-debugging-options -enable-testing -index-store-path /Users/admin/builder/spi-builder-workspace/.derivedData/Index.noindex/DataStore -Xcc -D_LIBCPP_HARDENING_MODE\=_LIBCPP_HARDENING_MODE_DEBUG -swift-version 5 -I /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-watchos -Isystem /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-watchos -F /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/Library/Frameworks -F /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/Developer/Library/Frameworks -c -j10 -enable-batch-mode -incremental -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/watchos26.4-23T238-688ef53f1462e2c8f657fdc38a81448f9e51884a582f42380855760c9d4cc599.sdkstatcache -output-file-map /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/arm64_32/MondrianLayout-OutputFileMap.json -use-frontend-parseable-output -save-temps -no-color-diagnostics -explicit-module-build -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SwiftExplicitPrecompiledModules -clang-scanner-module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -sdk-module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -serialize-diagnostics -emit-dependencies -emit-module -emit-module-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/arm64_32/MondrianLayout.swiftmodule -validate-clang-modules-once -clang-build-session-file /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/Session.modulevalidation -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/swift-overrides.hmap -emit-const-values -Xfrontend -const-gather-protocols-file -Xfrontend /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/arm64_32/MondrianLayout_const_extract_protocols.json -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-watchos/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/DerivedSources-normal/arm64_32 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/DerivedSources/arm64_32 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -emit-objc-header -emit-objc-header-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/arm64_32/MondrianLayout-Swift.h -working-directory /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode -experimental-emit-module-separately -disable-cmo
SwiftDriver MondrianLayout normal arm64 com.apple.xcode.tools.swift.compiler (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-SwiftDriver -- /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc -module-name MondrianLayout -Onone @/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/arm64/MondrianLayout.SwiftFileList -DSWIFT_PACKAGE -DDEBUG -DSWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -DXcode -plugin-path /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins/testing -enable-experimental-feature DebugDescriptionMacro -sdk /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -target arm64-apple-watchos5.0 -g -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -Xfrontend -serialize-debugging-options -enable-testing -index-store-path /Users/admin/builder/spi-builder-workspace/.derivedData/Index.noindex/DataStore -Xcc -D_LIBCPP_HARDENING_MODE\=_LIBCPP_HARDENING_MODE_DEBUG -swift-version 5 -I /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-watchos -Isystem /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-watchos -F /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/Library/Frameworks -F /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/Developer/Library/Frameworks -c -j10 -enable-batch-mode -incremental -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/watchos26.4-23T238-688ef53f1462e2c8f657fdc38a81448f9e51884a582f42380855760c9d4cc599.sdkstatcache -output-file-map /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/arm64/MondrianLayout-OutputFileMap.json -use-frontend-parseable-output -save-temps -no-color-diagnostics -explicit-module-build -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SwiftExplicitPrecompiledModules -clang-scanner-module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -sdk-module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -serialize-diagnostics -emit-dependencies -emit-module -emit-module-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/arm64/MondrianLayout.swiftmodule -validate-clang-modules-once -clang-build-session-file /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/Session.modulevalidation -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/swift-overrides.hmap -emit-const-values -Xfrontend -const-gather-protocols-file -Xfrontend /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/arm64/MondrianLayout_const_extract_protocols.json -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-watchos/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -emit-objc-header -emit-objc-header-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/arm64/MondrianLayout-Swift.h -working-directory /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode -experimental-emit-module-separately -disable-cmo
SwiftDriver MondrianLayout normal armv7k com.apple.xcode.tools.swift.compiler (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-SwiftDriver -- /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc -module-name MondrianLayout -Onone @/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/armv7k/MondrianLayout.SwiftFileList -DSWIFT_PACKAGE -DDEBUG -DSWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -DXcode -plugin-path /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins/testing -enable-experimental-feature DebugDescriptionMacro -sdk /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -target armv7k-apple-watchos5.0 -g -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -Xfrontend -serialize-debugging-options -enable-testing -index-store-path /Users/admin/builder/spi-builder-workspace/.derivedData/Index.noindex/DataStore -Xcc -D_LIBCPP_HARDENING_MODE\=_LIBCPP_HARDENING_MODE_DEBUG -swift-version 5 -I /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-watchos -Isystem /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-watchos -F /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/Library/Frameworks -F /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/Developer/Library/Frameworks -c -j10 -enable-batch-mode -incremental -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/watchos26.4-23T238-688ef53f1462e2c8f657fdc38a81448f9e51884a582f42380855760c9d4cc599.sdkstatcache -output-file-map /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/armv7k/MondrianLayout-OutputFileMap.json -use-frontend-parseable-output -save-temps -no-color-diagnostics -explicit-module-build -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SwiftExplicitPrecompiledModules -clang-scanner-module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -sdk-module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -serialize-diagnostics -emit-dependencies -emit-module -emit-module-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/armv7k/MondrianLayout.swiftmodule -validate-clang-modules-once -clang-build-session-file /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/Session.modulevalidation -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/swift-overrides.hmap -emit-const-values -Xfrontend -const-gather-protocols-file -Xfrontend /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/armv7k/MondrianLayout_const_extract_protocols.json -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-watchos/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/DerivedSources-normal/armv7k -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/DerivedSources/armv7k -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -emit-objc-header -emit-objc-header-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/armv7k/MondrianLayout-Swift.h -working-directory /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode -experimental-emit-module-separately -disable-cmo
SwiftCompile normal arm64 Compiling\ Edge.swift,\ LayoutBuilderContext.swift,\ Optimization.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/Edge.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/LayoutBuilderContext.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/Optimization.swift (in target 'MondrianLayout' from project 'MondrianLayout')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/Edge.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/LayoutBuilderContext.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/Optimization.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 Compiling\ VHStackContentBuilder.swift,\ _LayoutBlockNode.swift,\ _LayoutBlockType.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/VHStackContentBuilder.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/_LayoutBlockNode.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/_LayoutBlockType.swift (in target 'MondrianLayout' from project 'MondrianLayout')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/VHStackContentBuilder.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/_LayoutBlockNode.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/_LayoutBlockType.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 Compiling\ LayoutDescriptor.swift,\ MondrianArrayBuilder.swift,\ DimensionDescriptor.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/MondrianArrayBuilder.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift (in target 'MondrianLayout' from project 'MondrianLayout')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/MondrianArrayBuilder.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 Compiling\ BackgroundBlock.swift,\ HStackBlock.swift,\ LayoutContainer.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/BackgroundBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/HStackBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/LayoutContainer.swift (in target 'MondrianLayout' from project 'MondrianLayout')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/BackgroundBlock.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/HStackBlock.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/LayoutContainer.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 Compiling\ LayoutGuideBlock.swift,\ OverlayBlock.swift,\ RelativeBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/LayoutGuideBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/OverlayBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/RelativeBlock.swift (in target 'MondrianLayout' from project 'MondrianLayout')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/LayoutGuideBlock.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/OverlayBlock.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/RelativeBlock.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 Compiling\ UIView+Mondrian.swift,\ Utils.swift,\ _LayoutElement.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/UIView+Mondrian.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/Utils.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift (in target 'MondrianLayout' from project 'MondrianLayout')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/UIView+Mondrian.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/Utils.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 Compiling\ StackingSpacer.swift,\ VGridBlock.swift,\ VStackBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/StackingSpacer.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/VGridBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/VStackBlock.swift (in target 'MondrianLayout' from project 'MondrianLayout')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/StackingSpacer.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/VGridBlock.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/VStackBlock.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 Compiling\ EntryPoint.swift,\ NSLayoutConstraint+.swift,\ UILayoutGuide+Mondrian.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/EntryPoint.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/NSLayoutConstraint+.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/UILayoutGuide+Mondrian.swift (in target 'MondrianLayout' from project 'MondrianLayout')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/EntryPoint.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/NSLayoutConstraint+.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/UILayoutGuide+Mondrian.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftEmitModule normal arm64 Emitting\ module\ for\ MondrianLayout (in target 'MondrianLayout' from project 'MondrianLayout')
Failed frontend command:
/Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend -frontend -emit-module -experimental-skip-non-inlinable-function-bodies-without-types /Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/MondrianArrayBuilder.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/Edge.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/LayoutBuilderContext.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/Optimization.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/VHStackContentBuilder.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/_LayoutBlockNode.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/_LayoutBlockType.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/EntryPoint.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/NSLayoutConstraint+.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/UILayoutGuide+Mondrian.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/UIView+Mondrian.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/Utils.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/BackgroundBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/HStackBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/LayoutContainer.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/LayoutGuideBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/OverlayBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/RelativeBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/StackingSpacer.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/VGridBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/VStackBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ZStackBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/Manager/LayoutManager.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/MondrianNamespace.swift -target arm64-apple-watchos5.0 -load-resolved-plugin /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/usr/lib/swift/host/plugins/libFoundationMacros.dylib\#/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/usr/bin/swift-plugin-server\#FoundationMacros -load-resolved-plugin /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/usr/lib/swift/host/plugins/libObservationMacros.dylib\#/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/usr/bin/swift-plugin-server\#ObservationMacros -load-resolved-plugin /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/usr/lib/swift/host/plugins/libSwiftMacros.dylib\#/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/usr/bin/swift-plugin-server\#SwiftMacros -load-resolved-plugin /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/usr/lib/swift/host/plugins/libSwiftUIMacros.dylib\#/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/usr/bin/swift-plugin-server\#SwiftUIMacros -disable-implicit-swift-modules -Xcc -fno-implicit-modules -Xcc -fno-implicit-module-maps -explicit-swift-module-map-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/arm64/MondrianLayout-dependencies-3.json -Xllvm -aarch64-use-tbi -enable-objc-interop -sdk /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -I /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-watchos -Isystem /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-watchos -F /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/Library/Frameworks -F /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/Developer/Library/Frameworks -no-color-diagnostics -Xcc -fno-color-diagnostics -enable-testing -g -debug-info-format\=dwarf -dwarf-version\=4 -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SwiftExplicitPrecompiledModules -swift-version 5 -Onone -D SWIFT_PACKAGE -D DEBUG -D SWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -D Xcode -serialize-debugging-options -const-gather-protocols-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/arm64/MondrianLayout_const_extract_protocols.json -enable-experimental-feature DebugDescriptionMacro -empty-abi-descriptor -validate-clang-modules-once -clang-build-session-file /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/Session.modulevalidation -Xcc -working-directory -Xcc /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode -enable-anonymous-context-mangled-names -file-compilation-dir /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode -Xcc -D_LIBCPP_HARDENING_MODE\=_LIBCPP_HARDENING_MODE_DEBUG -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/watchos26.4-23T238-688ef53f1462e2c8f657fdc38a81448f9e51884a582f42380855760c9d4cc599.sdkstatcache -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/swift-overrides.hmap -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-watchos/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name MondrianLayout -frontend-parseable-output -disable-clang-spi -clang-target arm64-apple-watchos26.4 -target-sdk-version 26.4 -target-sdk-name watchos26.4 -in-process-plugin-server-path /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/libSwiftInProcPluginServer.dylib -emit-module-doc-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/arm64/MondrianLayout.swiftdoc -emit-module-source-info-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/arm64/MondrianLayout.swiftsourceinfo -emit-objc-header-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/arm64/MondrianLayout-Swift.h -serialize-diagnostics-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/arm64/MondrianLayout-primary-emit-module.dia -emit-dependencies-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/arm64/MondrianLayout-primary-emit-module.d -o /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/arm64/MondrianLayout.swiftmodule -emit-abi-descriptor-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/MondrianLayout.build/Debug-watchos/MondrianLayout.build/Objects-normal/arm64/MondrianLayout.abi.json
EmitSwiftModule normal arm64 (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:16:41: error: 'NSLayoutConstraint' is unavailable in watchOS
  public private(set) var constraints: [NSLayoutConstraint]
                                        ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:19:19: error: 'NSLayoutConstraint' is unavailable in watchOS
    constraints: [NSLayoutConstraint]
                  ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:24:36: error: 'NSLayoutConstraint' is unavailable in watchOS
  public func append(_ constraint: NSLayoutConstraint) {
                                   ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:68:33: error: 'UIView' is unavailable in watchOS
  public static func to(_ view: UIView) -> LayoutDescriptorElement {
                                ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:72:40: error: 'UILayoutGuide' is unavailable in watchOS
  public static func to(_ layoutGuide: UILayoutGuide) -> LayoutDescriptorElement {
                                       ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:183:26: error: 'UILayoutPriority' is unavailable in watchOS
    public var priority: UILayoutPriority
                         ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:196:17: error: 'UILayoutPriority' is unavailable in watchOS
      priority: UILayoutPriority
                ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:204:58: error: 'UILayoutPriority' is unavailable in watchOS
    public static func min(_ value: CGFloat, _ priority: UILayoutPriority = .required) -> Self {
                                                         ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:204:78: error: 'required' is unavailable in watchOS
    public static func min(_ value: CGFloat, _ priority: UILayoutPriority = .required) -> Self {
                                                                             ^~~~~~~~
UIKit.UILayoutPriority.required:3:21: note: 'required' has been explicitly marked unavailable here
  public static var required: UILayoutPriority { get }}
                    ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:209:60: error: 'UILayoutPriority' is unavailable in watchOS
    public static func exact(_ value: CGFloat, _ priority: UILayoutPriority = .required) -> Self
                                                           ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:209:80: error: 'required' is unavailable in watchOS
    public static func exact(_ value: CGFloat, _ priority: UILayoutPriority = .required) -> Self
                                                                               ^~~~~~~~
UIKit.UILayoutPriority.required:3:21: note: 'required' has been explicitly marked unavailable here
  public static var required: UILayoutPriority { get }}
                    ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:215:58: error: 'UILayoutPriority' is unavailable in watchOS
    public static func max(_ value: CGFloat, _ priority: UILayoutPriority = .required) -> Self {
                                                         ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:215:78: error: 'required' is unavailable in watchOS
    public static func max(_ value: CGFloat, _ priority: UILayoutPriority = .required) -> Self {
                                                                             ^~~~~~~~
UIKit.UILayoutPriority.required:3:21: note: 'required' has been explicitly marked unavailable here
  public static var required: UILayoutPriority { get }}
                    ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:224:11: error: 'UIView' is unavailable in watchOS
    view: UIView
          ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:231:18: error: 'UILayoutGuide' is unavailable in watchOS
    layoutGuide: UILayoutGuide
                 ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:257:37: error: 'NSLayoutConstraint' is unavailable in watchOS
  private var proposedConstraints: [NSLayoutConstraint] = []
                                    ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:271:52: error: 'NSLayoutConstraint' is unavailable in watchOS
    _ closure: (_LayoutElement, _LayoutElement) -> NSLayoutConstraint
                                                   ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:272:8: error: 'NSLayoutConstraint' is unavailable in watchOS
  ) -> NSLayoutConstraint? {
       ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:289:53: error: 'NSLayoutConstraint' is unavailable in watchOS
    _ closure: (_LayoutElement, _LayoutElement) -> [NSLayoutConstraint]
                                                    ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:290:9: error: 'NSLayoutConstraint' is unavailable in watchOS
  ) -> [NSLayoutConstraint]? {
        ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:609:37: error: 'NSLayoutConstraint' is unavailable in watchOS
  public func makeConstraints() -> [NSLayoutConstraint] {
                                    ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:621:16: error: 'NSLayoutDimension' is unavailable in watchOS
    to anchor: NSLayoutDimension
               ^~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:81:12: note: 'NSLayoutDimension' has been explicitly marked unavailable here
@interface NSLayoutDimension : NSLayoutAnchor<NSLayoutDimension *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:622:8: error: 'NSLayoutConstraint' is unavailable in watchOS
  ) -> NSLayoutConstraint {
       ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:616:11: error: 'NSLayoutDimension' is unavailable in watchOS
extension NSLayoutDimension {
          ^~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:81:12: note: 'NSLayoutDimension' has been explicitly marked unavailable here
@interface NSLayoutDimension : NSLayoutAnchor<NSLayoutDimension *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:656:16: error: 'NSLayoutXAxisAnchor' is unavailable in watchOS
    to anchor: NSLayoutXAxisAnchor
               ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:64:12: note: 'NSLayoutXAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutXAxisAnchor : NSLayoutAnchor<NSLayoutXAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:657:8: error: 'NSLayoutConstraint' is unavailable in watchOS
  ) -> NSLayoutConstraint {
       ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:652:11: error: 'NSLayoutXAxisAnchor' is unavailable in watchOS
extension NSLayoutXAxisAnchor {
          ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:64:12: note: 'NSLayoutXAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutXAxisAnchor : NSLayoutAnchor<NSLayoutXAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:679:16: error: 'NSLayoutYAxisAnchor' is unavailable in watchOS
    to anchor: NSLayoutYAxisAnchor
               ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:72:12: note: 'NSLayoutYAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutYAxisAnchor : NSLayoutAnchor<NSLayoutYAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:680:8: error: 'NSLayoutConstraint' is unavailable in watchOS
  ) -> NSLayoutConstraint {
       ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Classic/LayoutDescriptor.swift:675:11: error: 'NSLayoutYAxisAnchor' is unavailable in watchOS
extension NSLayoutYAxisAnchor {
          ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:72:12: note: 'NSLayoutYAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutYAxisAnchor : NSLayoutAnchor<NSLayoutYAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:7:26: error: 'UILayoutPriority' is unavailable in watchOS
    public var priority: UILayoutPriority
                         ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:21:41: error: 'UIView' is unavailable in watchOS
  public func makeConstraints(for view: UIView) -> [NSLayoutConstraint] {
                                        ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:21:53: error: 'NSLayoutConstraint' is unavailable in watchOS
  public func makeConstraints(for view: UIView) -> [NSLayoutConstraint] {
                                                    ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:25:48: error: 'UILayoutGuide' is unavailable in watchOS
  public func makeConstraints(for layoutGuide: UILayoutGuide) -> [NSLayoutConstraint] {
                                               ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:25:67: error: 'NSLayoutConstraint' is unavailable in watchOS
  public func makeConstraints(for layoutGuide: UILayoutGuide) -> [NSLayoutConstraint] {
                                                                  ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:29:54: error: 'NSLayoutConstraint' is unavailable in watchOS
  func makeConstraints(for view: _LayoutElement) -> [NSLayoutConstraint] {
                                                     ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:112:55: error: 'UILayoutPriority' is unavailable in watchOS
  public func aspectRatio(_ ratio: CGFloat, priority: UILayoutPriority = .required) -> Self {
                                                      ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:112:75: error: 'required' is unavailable in watchOS
  public func aspectRatio(_ ratio: CGFloat, priority: UILayoutPriority = .required) -> Self {
                                                                          ^~~~~~~~
UIKit.UILayoutPriority.required:3:21: note: 'required' has been explicitly marked unavailable here
  public static var required: UILayoutPriority { get }}
                    ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:207:46: error: 'UILayoutPriority' is unavailable in watchOS
  public func size(_ size: CGSize, priority: UILayoutPriority = .required) -> Self {
                                             ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:207:66: error: 'required' is unavailable in watchOS
  public func size(_ size: CGSize, priority: UILayoutPriority = .required) -> Self {
                                                                 ^~~~~~~~
UIKit.UILayoutPriority.required:3:21: note: 'required' has been explicitly marked unavailable here
  public static var required: UILayoutPriority { get }}
                    ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:217:49: error: 'UILayoutPriority' is unavailable in watchOS
  public func size(_ length: CGFloat, priority: UILayoutPriority = .required) -> Self {
                                                ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/DimensionDescriptor.swift:217:69: error: 'required' is unavailable in watchOS
  public func size(_ length: CGFloat, priority: UILayoutPriority = .required) -> Self {
                                                                    ^~~~~~~~
UIKit.UILayoutPriority.required:3:21: note: 'required' has been explicitly marked unavailable here
  public static var required: UILayoutPriority { get }}
                    ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/LayoutBuilderContext.swift:11:31: error: 'UIView' is unavailable in watchOS
  public weak var targetView: UIView?
                              ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/LayoutBuilderContext.swift:17:17: error: 'UIView' is unavailable in watchOS
    targetView: UIView
                ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/LayoutBuilderContext.swift:23:49: error: 'UILayoutGuide' is unavailable in watchOS
  public private(set) var managedLayoutGuides: [UILayoutGuide] = []
                                                ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/LayoutBuilderContext.swift:24:41: error: 'NSLayoutConstraint' is unavailable in watchOS
  public private(set) var constraints: [NSLayoutConstraint] = []
                                        ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/LayoutBuilderContext.swift:29:26: error: 'NSLayoutConstraint' is unavailable in watchOS
  func add(constraints: [NSLayoutConstraint]) {
                         ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/LayoutBuilderContext.swift:33:47: error: 'UILayoutGuide' is unavailable in watchOS
  func makeLayoutGuide(identifier: String) -> UILayoutGuide {
                                              ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/VHStackContentBuilder.swift:161:55: error: 'UILayoutGuide' is unavailable in watchOS
  public static func buildExpression(_ layoutGuides: [UILayoutGuide]...) -> [Component] {
                                                      ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/VHStackContentBuilder.swift:167:51: error: 'UILayoutGuide' is unavailable in watchOS
  public static func buildExpression<LayoutGuide: UILayoutGuide>(_ layoutGuide: LayoutGuide) -> [Component] {
                                                  ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/VHStackContentBuilder.swift:173:51: error: 'UILayoutGuide' is unavailable in watchOS
  public static func buildExpression<LayoutGuide: UILayoutGuide>(_ layoutGuide: LayoutGuide?) -> [Component] {
                                                  ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/VHStackContentBuilder.swift:178:48: error: 'UIView' is unavailable in watchOS
  public static func buildExpression(_ views: [UIView]...) -> [Component] {
                                               ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/VHStackContentBuilder.swift:184:44: error: 'UIView' is unavailable in watchOS
  public static func buildExpression<View: UIView>(_ view: View) -> [Component] {
                                           ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/VHStackContentBuilder.swift:190:44: error: 'UIView' is unavailable in watchOS
  public static func buildExpression<View: UIView>(_ view: View?) -> [Component] {
                                           ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/VHStackContentBuilder.swift:239:48: error: 'UIView' is unavailable in watchOS
  public static func buildExpression(_ views: [UIView]...) -> [Component] {
                                               ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/VHStackContentBuilder.swift:245:44: error: 'UIView' is unavailable in watchOS
  public static func buildExpression<View: UIView>(_ view: View) -> [Component] {
                                           ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/VHStackContentBuilder.swift:251:44: error: 'UIView' is unavailable in watchOS
  public static func buildExpression<View: UIView>(_ view: View?) -> [Component] {
                                           ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/_LayoutBlockNode.swift:38:34: error: 'UIView' is unavailable in watchOS
  public func background(_ view: UIView) -> BackgroundBlock {
                                 ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Descriptors/_LayoutBlockNode.swift:46:31: error: 'UIView' is unavailable in watchOS
  public func overlay(_ view: UIView) -> OverlayBlock {
                              ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/EntryPoint.swift:61:14: error: 'UIView' is unavailable in watchOS
    on view: UIView,
             ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/NSLayoutConstraint+.swift:6:51: error: 'NSLayoutConstraint' is unavailable in watchOS
  func setInternalIdentifier(_ string: String) -> NSLayoutConstraint {
                                                  ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/NSLayoutConstraint+.swift:12:43: error: 'NSLayoutConstraint' is unavailable in watchOS
  func setIdentifier(_ string: String) -> NSLayoutConstraint {
                                          ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/NSLayoutConstraint+.swift:18:32: error: 'UILayoutPriority' is unavailable in watchOS
  func setPriority(_ priority: UILayoutPriority) -> NSLayoutConstraint {
                               ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/NSLayoutConstraint+.swift:18:53: error: 'NSLayoutConstraint' is unavailable in watchOS
  func setPriority(_ priority: UILayoutPriority) -> NSLayoutConstraint {
                                                    ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/NSLayoutConstraint+.swift:3:11: error: 'NSLayoutConstraint' is unavailable in watchOS
extension NSLayoutConstraint {
          ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/UILayoutGuide+Mondrian.swift:5:42: error: 'UILayoutGuide' is unavailable in watchOS
  public var mondrian: MondrianNamespace<UILayoutGuide> {
                                         ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/UILayoutGuide+Mondrian.swift:3:11: error: 'UILayoutGuide' is unavailable in watchOS
extension UILayoutGuide {
          ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/UIView+Mondrian.swift:37:42: error: 'UIView' is unavailable in watchOS
extension MondrianNamespace where Base : UIView {
                                         ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/UIView+Mondrian.swift:63:42: error: 'UIView' is unavailable in watchOS
  public var mondrian: MondrianNamespace<UIView> {
                                         ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/UIView+Mondrian.swift:61:11: error: 'UIView' is unavailable in watchOS
extension UIView {
          ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Extensions/UIView+Mondrian.swift:71:11: error: 'UIView' is unavailable in watchOS
extension UIView {
          ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:9:11: error: 'UIView' is unavailable in watchOS
extension UIView: __LayoutElementConvertible {
          ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:16:11: error: 'UILayoutGuide' is unavailable in watchOS
extension UILayoutGuide: __LayoutElementConvertible {
          ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:51:22: error: 'NSLayoutXAxisAnchor' is unavailable in watchOS
  let leadingAnchor: NSLayoutXAxisAnchor
                     ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:64:12: note: 'NSLayoutXAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutXAxisAnchor : NSLayoutAnchor<NSLayoutXAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:52:23: error: 'NSLayoutXAxisAnchor' is unavailable in watchOS
  let trailingAnchor: NSLayoutXAxisAnchor
                      ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:64:12: note: 'NSLayoutXAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutXAxisAnchor : NSLayoutAnchor<NSLayoutXAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:53:19: error: 'NSLayoutXAxisAnchor' is unavailable in watchOS
  let leftAnchor: NSLayoutXAxisAnchor
                  ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:64:12: note: 'NSLayoutXAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutXAxisAnchor : NSLayoutAnchor<NSLayoutXAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:54:20: error: 'NSLayoutXAxisAnchor' is unavailable in watchOS
  let rightAnchor: NSLayoutXAxisAnchor
                   ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:64:12: note: 'NSLayoutXAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutXAxisAnchor : NSLayoutAnchor<NSLayoutXAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:55:18: error: 'NSLayoutYAxisAnchor' is unavailable in watchOS
  let topAnchor: NSLayoutYAxisAnchor
                 ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:72:12: note: 'NSLayoutYAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutYAxisAnchor : NSLayoutAnchor<NSLayoutYAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:56:21: error: 'NSLayoutYAxisAnchor' is unavailable in watchOS
  let bottomAnchor: NSLayoutYAxisAnchor
                    ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:72:12: note: 'NSLayoutYAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutYAxisAnchor : NSLayoutAnchor<NSLayoutYAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:57:20: error: 'NSLayoutDimension' is unavailable in watchOS
  let widthAnchor: NSLayoutDimension
                   ^~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:81:12: note: 'NSLayoutDimension' has been explicitly marked unavailable here
@interface NSLayoutDimension : NSLayoutAnchor<NSLayoutDimension *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:58:21: error: 'NSLayoutDimension' is unavailable in watchOS
  let heightAnchor: NSLayoutDimension
                    ^~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:81:12: note: 'NSLayoutDimension' has been explicitly marked unavailable here
@interface NSLayoutDimension : NSLayoutAnchor<NSLayoutDimension *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:59:22: error: 'NSLayoutXAxisAnchor' is unavailable in watchOS
  let centerXAnchor: NSLayoutXAxisAnchor
                     ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:64:12: note: 'NSLayoutXAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutXAxisAnchor : NSLayoutAnchor<NSLayoutXAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:60:22: error: 'NSLayoutYAxisAnchor' is unavailable in watchOS
  let centerYAnchor: NSLayoutYAxisAnchor
                     ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:72:12: note: 'NSLayoutYAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutYAxisAnchor : NSLayoutAnchor<NSLayoutYAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:62:19: error: 'UIView' is unavailable in watchOS
  var owningView: UIView? {
                  ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:66:13: error: 'UIView' is unavailable in watchOS
  let view: UIView?
            ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:67:20: error: 'UILayoutGuide' is unavailable in watchOS
  let layoutGuide: UILayoutGuide?
                   ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:69:21: error: 'UIView' is unavailable in watchOS
  public init(view: UIView) {
                    ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:86:28: error: 'UILayoutGuide' is unavailable in watchOS
  public init(layoutGuide: UILayoutGuide) {
                           ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:104:39: error: 'NSLayoutXAxisAnchor' is unavailable in watchOS
  func anchor(_ type: XAxisAnchor) -> NSLayoutXAxisAnchor {
                                      ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:64:12: note: 'NSLayoutXAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutXAxisAnchor : NSLayoutAnchor<NSLayoutXAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:119:39: error: 'NSLayoutYAxisAnchor' is unavailable in watchOS
  func anchor(_ type: YAxisAnchor) -> NSLayoutYAxisAnchor {
                                      ^~~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:72:12: note: 'NSLayoutYAxisAnchor' has been explicitly marked unavailable here
@interface NSLayoutYAxisAnchor : NSLayoutAnchor<NSLayoutYAxisAnchor *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Internal/_LayoutElement.swift:130:43: error: 'NSLayoutDimension' is unavailable in watchOS
  func anchor(_ type: DimensionAnchor) -> NSLayoutDimension {
                                          ^~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutAnchor.h:81:12: note: 'NSLayoutDimension' has been explicitly marked unavailable here
@interface NSLayoutDimension : NSLayoutAnchor<NSLayoutDimension *>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/LayoutContainer.swift:63:33: error: 'UIView' is unavailable in watchOS
  func setupConstraints(parent: UIView, in context: LayoutBuilderContext) {
                                ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/LayoutGuideBlock.swift:13:27: error: 'UILayoutGuide' is unavailable in watchOS
  public let layoutGuide: UILayoutGuide
                          ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/LayoutGuideBlock.swift:18:20: error: 'UILayoutGuide' is unavailable in watchOS
    _ layoutGuide: UILayoutGuide
                   ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/LayoutGuideBlock.swift:23:61: error: 'NSLayoutConstraint' is unavailable in watchOS
  func makeConstraintsToEdge(_ element: _LayoutElement) -> [NSLayoutConstraint] {
                                                            ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/LayoutGuideBlock.swift:27:30: error: 'NSLayoutConstraint' is unavailable in watchOS
  func makeConstraints() -> [NSLayoutConstraint] {
                             ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/VGridBlock.swift:271:48: error: 'UIView' is unavailable in watchOS
  public static func buildExpression(_ views: [UIView]...) -> [Component] {
                                               ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/VGridBlock.swift:277:44: error: 'UIView' is unavailable in watchOS
  public static func buildExpression<View: UIView>(_ view: View) -> [Component] {
                                           ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/VGridBlock.swift:283:44: error: 'UIView' is unavailable in watchOS
  public static func buildExpression<View: UIView>(_ view: View?) -> [Component] {
                                           ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:26:20: error: 'UIView' is unavailable in watchOS
  public let view: UIView
                   ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:30:32: error: 'UILayoutPriority' is unavailable in watchOS
  var verticalHuggingPriority: UILayoutPriority?
                               ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:31:34: error: 'UILayoutPriority' is unavailable in watchOS
  var horizontalHuggingPriority: UILayoutPriority?
                                 ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:33:46: error: 'UILayoutPriority' is unavailable in watchOS
  var verticalCompressionResistancePriority: UILayoutPriority?
                                             ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:34:48: error: 'UILayoutPriority' is unavailable in watchOS
  var horizontalCompressionResistancePriority: UILayoutPriority?
                                               ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:37:13: error: 'UIView' is unavailable in watchOS
    _ view: UIView
            ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:50:17: error: 'UILayoutPriority' is unavailable in watchOS
    _ priority: UILayoutPriority = .required
                ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:50:37: error: 'required' is unavailable in watchOS
    _ priority: UILayoutPriority = .required
                                    ^~~~~~~~
UIKit.UILayoutPriority.required:3:21: note: 'required' has been explicitly marked unavailable here
  public static var required: UILayoutPriority { get }}
                    ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:64:17: error: 'UILayoutPriority' is unavailable in watchOS
    _ priority: UILayoutPriority = .required
                ^~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:17:15: note: 'UILayoutPriority' has been explicitly marked unavailable here
typedef float UILayoutPriority NS_TYPED_EXTENSIBLE_ENUM API_UNAVAILABLE(watchos);
              ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:64:37: error: 'required' is unavailable in watchOS
    _ priority: UILayoutPriority = .required
                                    ^~~~~~~~
UIKit.UILayoutPriority.required:3:21: note: 'required' has been explicitly marked unavailable here
  public static var required: UILayoutPriority { get }}
                    ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:76:61: error: 'NSLayoutConstraint' is unavailable in watchOS
  func makeConstraintsToEdge(_ element: _LayoutElement) -> [NSLayoutConstraint] {
                                                            ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift:108:30: error: 'NSLayoutConstraint' is unavailable in watchOS
  func makeConstraints() -> [NSLayoutConstraint] {
                             ^~~~~~~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/NSLayoutConstraint.h:126:12: note: 'NSLayoutConstraint' has been explicitly marked unavailable here
@interface NSLayoutConstraint : NSObject
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ZStackBlock.swift:271:55: error: 'UILayoutGuide' is unavailable in watchOS
  public static func buildExpression(_ layoutGuides: [UILayoutGuide]...) -> [Component] {
                                                      ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ZStackBlock.swift:277:51: error: 'UILayoutGuide' is unavailable in watchOS
  public static func buildExpression<LayoutGuide: UILayoutGuide>(_ layoutGuide: LayoutGuide) -> [Component] {
                                                  ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ZStackBlock.swift:283:51: error: 'UILayoutGuide' is unavailable in watchOS
  public static func buildExpression<LayoutGuide: UILayoutGuide>(_ layoutGuide: LayoutGuide?) -> [Component] {
                                                  ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ZStackBlock.swift:288:48: error: 'UIView' is unavailable in watchOS
  public static func buildExpression(_ views: [UIView]...) -> [Component] {
                                               ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ZStackBlock.swift:294:44: error: 'UIView' is unavailable in watchOS
  public static func buildExpression<View: UIView>(_ view: View) -> [Component] {
                                           ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ZStackBlock.swift:300:44: error: 'UIView' is unavailable in watchOS
  public static func buildExpression<View: UIView>(_ view: View?) -> [Component] {
                                           ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Manager/LayoutManager.swift:31:32: error: 'UIView' is unavailable in watchOS
  private weak var targetView: UIView?
                               ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/Manager/LayoutManager.swift:43:14: error: 'UIView' is unavailable in watchOS
    on view: UIView,
             ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/MondrianNamespace.swift:12:41: error: 'UIView' is unavailable in watchOS
extension MondrianNamespace where Base: UIView {
                                        ^~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:148:12: note: 'UIView' has been explicitly marked unavailable here
@interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, UIFocusItemContainer, CALayerDelegate>
           ^
/Users/admin/builder/spi-builder-workspace/MondrianLayout/MondrianNamespace.swift:37:41: error: 'UILayoutGuide' is unavailable in watchOS
extension MondrianNamespace where Base: UILayoutGuide {
                                        ^~~~~~~~~~~~~
/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILayoutGuide.h:24:12: note: 'UILayoutGuide' has been explicitly marked unavailable here
@interface UILayoutGuide : NSObject <NSCoding>
           ^
SwiftCompile normal arm64 Compiling\ ViewBlock.swift,\ ZStackBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ZStackBlock.swift (in target 'MondrianLayout' from project 'MondrianLayout')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ViewBlock.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/MondrianLayout/LayoutBlocks/ZStackBlock.swift (in target 'MondrianLayout' from project 'MondrianLayout')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftEmitModule normal armv7k Emitting\ module\ for\ MondrianLayout (in target 'MondrianLayout' from project 'MondrianLayout')
2026-04-13 04:45:14.719 xcodebuild[999:5622] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
** BUILD FAILED **
The following build commands failed:
	SwiftEmitModule normal arm64 Emitting\ module\ for\ MondrianLayout (in target 'MondrianLayout' from project 'MondrianLayout')
	EmitSwiftModule normal arm64 (in target 'MondrianLayout' from project 'MondrianLayout')
	Building workspace spi-builder-workspace with scheme MondrianLayout-Package
(3 failures)
BUILD FAILURE 6.3 watchOS