Build Information
Failed to build OpenCombineJS, reference main (e393e6), with Swift 6.3 for watchOS using Xcode 26.4 on 12 Apr 2026 22:31:07 UTC.
Build Command
env DEVELOPER_DIR=/Applications/Xcode-26.4.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme OpenCombineJS-Package -destination generic/platform=watchOSBuild Log
========================================
RunAll
========================================
Builder version: 4.70.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/swiftwasm/OpenCombineJS.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/swiftwasm/OpenCombineJS
* branch main -> FETCH_HEAD
* [new branch] main -> origin/main
HEAD is now at e393e6d Update to v2 of Contributor Covenant in shared GitHub repo (#7)
Cloned https://github.com/swiftwasm/OpenCombineJS.git
Revision (git rev-parse @):
e393e6d449511615ea5445b04f4b97dc6e5fb141
SUCCESS checkout https://github.com/swiftwasm/OpenCombineJS.git at main
========================================
Build
========================================
Selected platform: watchOS
Swift version: 6.3
Building package at path: $PWD
https://github.com/swiftwasm/OpenCombineJS.git
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
Fetching from https://github.com/OpenCombine/OpenCombine.git
Fetching from https://github.com/swiftwasm/JavaScriptKit.git
Fetching from https://github.com/swiftlang/swift-syntax
Creating working copy of package ‘OpenCombine’
Checking out 0.14.0 of package ‘OpenCombine’
Creating working copy of package ‘JavaScriptKit’
Checking out 0.50.2 of package ‘JavaScriptKit’
Creating working copy of package ‘swift-syntax’
Checking out 603.0.0 of package ‘swift-syntax’
Downloading package prebuilt https://download.swift.org/prebuilts/swift-syntax/603.0.0/swiftlang-6.3.0.123.5-macosx26.4-MacroSupport.zip
Resolve Package Graph
Resolved source packages:
JavaScriptKit: https://github.com/swiftwasm/JavaScriptKit.git @ 0.50.2
swift-syntax: https://github.com/swiftlang/swift-syntax @ 603.0.0
OpenCombineJS: /Users/admin/builder/spi-builder-workspace
OpenCombine: https://github.com/OpenCombine/OpenCombine.git @ 0.14.0
resolved source packages: JavaScriptKit, swift-syntax, OpenCombineJS, OpenCombine
2026-04-12 18:30:32.815 xcodebuild[529:3065] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
{
"dependencies" : [
{
"identity" : "javascriptkit",
"requirement" : {
"range" : [
{
"lower_bound" : "0.13.0",
"upper_bound" : "1.0.0"
}
]
},
"type" : "sourceControl",
"url" : "https://github.com/swiftwasm/JavaScriptKit.git"
},
{
"identity" : "opencombine",
"requirement" : {
"range" : [
{
"lower_bound" : "0.13.0",
"upper_bound" : "1.0.0"
}
]
},
"type" : "sourceControl",
"url" : "https://github.com/OpenCombine/OpenCombine.git"
}
],
"manifest_display_name" : "OpenCombineJS",
"name" : "OpenCombineJS",
"path" : "/Users/admin/builder/spi-builder-workspace",
"platforms" : [
],
"products" : [
{
"name" : "OpenCombineJSExample",
"targets" : [
"OpenCombineJSExample"
],
"type" : {
"executable" : null
}
},
{
"name" : "OpenCombineJS",
"targets" : [
"OpenCombineJS"
],
"type" : {
"library" : [
"automatic"
]
}
}
],
"targets" : [
{
"c99name" : "OpenCombineJSExample",
"module_type" : "SwiftTarget",
"name" : "OpenCombineJSExample",
"path" : "Sources/OpenCombineJSExample",
"product_memberships" : [
"OpenCombineJSExample"
],
"sources" : [
"main.swift"
],
"target_dependencies" : [
"OpenCombineJS"
],
"type" : "executable"
},
{
"c99name" : "OpenCombineJS",
"module_type" : "SwiftTarget",
"name" : "OpenCombineJS",
"path" : "Sources/OpenCombineJS",
"product_dependencies" : [
"JavaScriptKit",
"OpenCombine"
],
"product_memberships" : [
"OpenCombineJSExample",
"OpenCombineJS"
],
"sources" : [
"JSPromise.swift",
"JSScheduler.swift",
"JSValueDecoder.swift"
],
"type" : "library"
}
],
"tools_version" : "5.3"
}
{
"workspace" : {
"name" : "spi-builder-workspace",
"schemes" : [
"OpenCombineJS",
"OpenCombineJS-Package",
"OpenCombineJSExample"
]
}
}
2026-04-12 18:30:47.119 xcodebuild[795:4727] [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 OpenCombineJS-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 OpenCombineJS-Package -destination generic/platform=watchOS
Resolve Package Graph
Resolve Package Graph
Resolved source packages:
OpenCombine: https://github.com/OpenCombine/OpenCombine.git @ 0.14.0
OpenCombineJS: /Users/admin/builder/spi-builder-workspace
JavaScriptKit: https://github.com/swiftwasm/JavaScriptKit.git @ 0.50.2
swift-syntax: https://github.com/swiftlang/swift-syntax @ 603.0.0
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (10 targets)
Target 'OpenCombineJSExample' in project 'OpenCombineJS'
➜ Explicit dependency on target 'OpenCombineJS' in project 'OpenCombineJS'
➜ Explicit dependency on target 'JavaScriptKit' in project 'JavaScriptKit'
➜ Explicit dependency on target 'OpenCombine' in project 'OpenCombine'
Target 'OpenCombineJS' in project 'OpenCombineJS'
➜ Explicit dependency on target 'OpenCombineJS' in project 'OpenCombineJS'
➜ Explicit dependency on target 'JavaScriptKit' in project 'JavaScriptKit'
➜ Explicit dependency on target 'OpenCombine' in project 'OpenCombine'
Target 'OpenCombineJS' in project 'OpenCombineJS'
➜ Explicit dependency on target 'JavaScriptKit' in project 'JavaScriptKit'
➜ Explicit dependency on target 'OpenCombine' in project 'OpenCombine'
Target 'OpenCombine' in project 'OpenCombine'
➜ Explicit dependency on target 'OpenCombine' in project 'OpenCombine'
➜ Explicit dependency on target 'COpenCombineHelpers' in project 'OpenCombine'
Target 'OpenCombine' in project 'OpenCombine'
➜ Explicit dependency on target 'COpenCombineHelpers' in project 'OpenCombine'
Target 'COpenCombineHelpers' in project 'OpenCombine' (no dependencies)
Target 'JavaScriptKit' in project 'JavaScriptKit'
➜ Explicit dependency on target 'JavaScriptKit' in project 'JavaScriptKit'
➜ Explicit dependency on target '_CJavaScriptKit' in project 'JavaScriptKit'
➜ Explicit dependency on target 'BridgeJSMacros' in project 'JavaScriptKit'
Target 'JavaScriptKit' in project 'JavaScriptKit'
➜ Explicit dependency on target '_CJavaScriptKit' in project 'JavaScriptKit'
➜ Explicit dependency on target 'BridgeJSMacros' in project 'JavaScriptKit'
Target 'BridgeJSMacros' in project 'JavaScriptKit' (no dependencies)
Target '_CJavaScriptKit' in project 'JavaScriptKit' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc --version
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -arch arm64 -isysroot /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -arch arm64 -isysroot /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -x c++ -c /dev/null
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -isysroot /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -isysroot /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX26.4.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld -version_details
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -arch armv7k -isysroot /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -arch armv7k -isysroot /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -x c++ -c /dev/null
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -arch arm64_32 -isysroot /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -x c++ -c /dev/null
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -arch arm64_32 -isysroot /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -x c -c /dev/null
ReadFileContents /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/share/docc/features.json
Build description signature: 77dc6684d04cf75b7c8475d717cbb050
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/77dc6684d04cf75b7c8475d717cbb050.xcbuilddata
error: The package product 'JavaScriptKit' requires minimum platform version 6.0 for the watchOS platform, but this target supports 5.0 (in target 'OpenCombineJS' from project 'OpenCombineJS')
error: The package product 'JavaScriptKit' requires minimum platform version 6.0 for the watchOS platform, but this target supports 5.0 (in target 'OpenCombineJSExample' from project 'OpenCombineJS')
2026-04-12 18:30:52.729 xcodebuild[819:4922] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
** BUILD FAILED **
The following build commands failed:
Building workspace spi-builder-workspace with scheme OpenCombineJS-Package
(1 failure)
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:
JavaScriptKit: https://github.com/swiftwasm/JavaScriptKit.git @ 0.50.2
OpenCombineJS: /Users/admin/builder/spi-builder-workspace
OpenCombine: https://github.com/OpenCombine/OpenCombine.git @ 0.14.0
swift-syntax: https://github.com/swiftlang/swift-syntax @ 603.0.0
resolved source packages: JavaScriptKit, OpenCombineJS, OpenCombine, swift-syntax
2026-04-12 18:30:59.452 xcodebuild[900:5360] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
{
"dependencies" : [
{
"identity" : "javascriptkit",
"requirement" : {
"range" : [
{
"lower_bound" : "0.13.0",
"upper_bound" : "1.0.0"
}
]
},
"type" : "sourceControl",
"url" : "https://github.com/swiftwasm/JavaScriptKit.git"
},
{
"identity" : "opencombine",
"requirement" : {
"range" : [
{
"lower_bound" : "0.13.0",
"upper_bound" : "1.0.0"
}
]
},
"type" : "sourceControl",
"url" : "https://github.com/OpenCombine/OpenCombine.git"
}
],
"manifest_display_name" : "OpenCombineJS",
"name" : "OpenCombineJS",
"path" : "/Users/admin/builder/spi-builder-workspace",
"platforms" : [
],
"products" : [
{
"name" : "OpenCombineJSExample",
"targets" : [
"OpenCombineJSExample"
],
"type" : {
"executable" : null
}
},
{
"name" : "OpenCombineJS",
"targets" : [
"OpenCombineJS"
],
"type" : {
"library" : [
"automatic"
]
}
}
],
"targets" : [
{
"c99name" : "OpenCombineJSExample",
"module_type" : "SwiftTarget",
"name" : "OpenCombineJSExample",
"path" : "Sources/OpenCombineJSExample",
"product_memberships" : [
"OpenCombineJSExample"
],
"sources" : [
"main.swift"
],
"target_dependencies" : [
"OpenCombineJS"
],
"type" : "executable"
},
{
"c99name" : "OpenCombineJS",
"module_type" : "SwiftTarget",
"name" : "OpenCombineJS",
"path" : "Sources/OpenCombineJS",
"product_dependencies" : [
"JavaScriptKit",
"OpenCombine"
],
"product_memberships" : [
"OpenCombineJSExample",
"OpenCombineJS"
],
"sources" : [
"JSPromise.swift",
"JSScheduler.swift",
"JSValueDecoder.swift"
],
"type" : "library"
}
],
"tools_version" : "5.3"
}
{
"workspace" : {
"name" : "spi-builder-workspace",
"schemes" : [
"OpenCombineJS",
"OpenCombineJS-Package",
"OpenCombineJSExample"
]
}
}
2026-04-12 18:31:02.979 xcodebuild[924:5521] [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 OpenCombineJS-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 OpenCombineJS-Package -destination generic/platform=watchOS
Resolve Package Graph
Resolved source packages:
OpenCombineJS: /Users/admin/builder/spi-builder-workspace
swift-syntax: https://github.com/swiftlang/swift-syntax @ 603.0.0
JavaScriptKit: https://github.com/swiftwasm/JavaScriptKit.git @ 0.50.2
OpenCombine: https://github.com/OpenCombine/OpenCombine.git @ 0.14.0
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (10 targets)
Target 'OpenCombineJSExample' in project 'OpenCombineJS'
➜ Explicit dependency on target 'OpenCombineJS' in project 'OpenCombineJS'
➜ Explicit dependency on target 'JavaScriptKit' in project 'JavaScriptKit'
➜ Explicit dependency on target 'OpenCombine' in project 'OpenCombine'
Target 'OpenCombineJS' in project 'OpenCombineJS'
➜ Explicit dependency on target 'OpenCombineJS' in project 'OpenCombineJS'
➜ Explicit dependency on target 'JavaScriptKit' in project 'JavaScriptKit'
➜ Explicit dependency on target 'OpenCombine' in project 'OpenCombine'
Target 'OpenCombineJS' in project 'OpenCombineJS'
➜ Explicit dependency on target 'JavaScriptKit' in project 'JavaScriptKit'
➜ Explicit dependency on target 'OpenCombine' in project 'OpenCombine'
Target 'OpenCombine' in project 'OpenCombine'
➜ Explicit dependency on target 'OpenCombine' in project 'OpenCombine'
➜ Explicit dependency on target 'COpenCombineHelpers' in project 'OpenCombine'
Target 'OpenCombine' in project 'OpenCombine'
➜ Explicit dependency on target 'COpenCombineHelpers' in project 'OpenCombine'
Target 'COpenCombineHelpers' in project 'OpenCombine' (no dependencies)
Target 'JavaScriptKit' in project 'JavaScriptKit'
➜ Explicit dependency on target 'JavaScriptKit' in project 'JavaScriptKit'
➜ Explicit dependency on target '_CJavaScriptKit' in project 'JavaScriptKit'
➜ Explicit dependency on target 'BridgeJSMacros' in project 'JavaScriptKit'
Target 'JavaScriptKit' in project 'JavaScriptKit'
➜ Explicit dependency on target '_CJavaScriptKit' in project 'JavaScriptKit'
➜ Explicit dependency on target 'BridgeJSMacros' in project 'JavaScriptKit'
Target 'BridgeJSMacros' in project 'JavaScriptKit' (no dependencies)
Target '_CJavaScriptKit' in project 'JavaScriptKit' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -arch arm64 -isysroot /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc --version
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -arch arm64 -isysroot /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -x c++ -c /dev/null
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -isysroot /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -isysroot /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX26.4.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld -version_details
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -arch armv7k -isysroot /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -x c++ -c /dev/null
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -arch armv7k -isysroot /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -arch arm64_32 -isysroot /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -arch arm64_32 -isysroot /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -x c++ -c /dev/null
ReadFileContents /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/share/docc/features.json
Build description signature: 77dc6684d04cf75b7c8475d717cbb050
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/77dc6684d04cf75b7c8475d717cbb050.xcbuilddata
error: The package product 'JavaScriptKit' requires minimum platform version 6.0 for the watchOS platform, but this target supports 5.0 (in target 'OpenCombineJS' from project 'OpenCombineJS')
error: The package product 'JavaScriptKit' requires minimum platform version 6.0 for the watchOS platform, but this target supports 5.0 (in target 'OpenCombineJSExample' from project 'OpenCombineJS')
2026-04-12 18:31:06.071 xcodebuild[941:5653] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
** BUILD FAILED **
The following build commands failed:
Building workspace spi-builder-workspace with scheme OpenCombineJS-Package
(1 failure)
BUILD FAILURE 6.3 watchOS