Swift Package IndexBuild Information
Failed to build HorizonCalendar with Swift 6.3 for watchOS using Xcode 26.4.
Build Command
Build command unavailableBuild Log
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RunAll
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Builder version: 4.70.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/airbnb/HorizonCalendar.git
Reference: v2.0.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/airbnb/HorizonCalendar
* tag v2.0.0 -> FETCH_HEAD
HEAD is now at a360d71 Bump version to 2.0.0 (#288)
Cloned https://github.com/airbnb/HorizonCalendar.git
Revision (git rev-parse @):
a360d71a1255f0b24e378f2ee31a7a7d674a49b6
SUCCESS checkout https://github.com/airbnb/HorizonCalendar.git at v2.0.0
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Build
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Selected platform: watchOS
Swift version: 6.3
Building package at path: $PWD
https://github.com/airbnb/HorizonCalendar.git
Command line invocation:
/Applications/Xcode-26.4.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
resolved source packages:
{
"dependencies" : [
{
"identity" : "swift",
"requirement" : {
"range" : [
{
"lower_bound" : "1.0.1",
"upper_bound" : "2.0.0"
}
]
},
"type" : "sourceControl",
"url" : "https://github.com/airbnb/swift"
}
],
"manifest_display_name" : "HorizonCalendar",
"name" : "HorizonCalendar",
"path" : "/Users/admin/builder/spi-builder-workspace",
"platforms" : [
{
"name" : "ios",
"version" : "11.0"
}
],
"products" : [
{
"name" : "HorizonCalendar",
"targets" : [
"HorizonCalendar"
],
"type" : {
"library" : [
"automatic"
]
}
}
],
"swift_languages_versions" : [
"5"
],
"targets" : [
{
"c99name" : "HorizonCalendarTests",
"module_type" : "SwiftTarget",
"name" : "HorizonCalendarTests",
"path" : "Tests",
"sources" : [
"CalendarContentTests.swift",
"DayHelperTests.swift",
"DayOfWeekPositionTests.swift",
"FrameProviderTests.swift",
"HorizontalMonthsLayoutOptionsTests.swift",
"ItemViewReuseManagerTests.swift",
"LayoutItemTypeEnumeratorTests.swift",
"MonthHelperTests.swift",
"MonthRowTests.swift",
"MonthTests.swift",
"PaginationHelpersTests.swift",
"ScreenPixelAlignmentTests.swift",
"ScrollMetricsMutatorTests.swift",
"SubviewsManagerTests.swift",
"VisibleItemsProviderTests.swift"
],
"target_dependencies" : [
"HorizonCalendar"
],
"type" : "test"
},
{
"c99name" : "HorizonCalendar",
"module_type" : "SwiftTarget",
"name" : "HorizonCalendar",
"path" : "Sources",
"product_memberships" : [
"HorizonCalendar"
],
"sources" : [
"Internal/CGFloat+MaxLayoutValue.swift",
"Internal/Calendar+Helpers.swift",
"Internal/CalendarScrollView.swift",
"Internal/ColorViewRepresentable.swift",
"Internal/Dictionary+MutatingValueForKey.swift",
"Internal/DoubleLayoutPassHelpers.swift",
"Internal/FrameProvider.swift",
"Internal/Hasher+CGRect.swift",
"Internal/ItemView.swift",
"Internal/ItemViewReuseManager.swift",
"Internal/LayoutItem.swift",
"Internal/LayoutItemTypeEnumerator.swift",
"Internal/PaginationHelpers.swift",
"Internal/ScreenPixelAlignment.swift",
"Internal/ScrollMetricsMutator.swift",
"Internal/ScrollToItemContext.swift",
"Internal/SubviewInsertionIndexTracker.swift",
"Internal/UIView+NoAnimation.swift",
"Internal/VisibleItem.swift",
"Internal/VisibleItemsProvider.swift",
"Public/AnyCalendarItemModel.swift",
"Public/CalendarItemModel.swift",
"Public/CalendarItemViewRepresentable.swift",
"Public/CalendarView.swift",
"Public/CalendarViewContent.swift",
"Public/CalendarViewProxy.swift",
"Public/CalendarViewRepresentable.swift",
"Public/CalendarViewScrollPosition.swift",
"Public/Day.swift",
"Public/DayOfWeekPosition.swift",
"Public/DayRange.swift",
"Public/DayRangeLayoutContext.swift",
"Public/DaysOfTheWeekRowSeparatorOptions.swift",
"Public/ItemViews/DayOfWeekView.swift",
"Public/ItemViews/DayView.swift",
"Public/ItemViews/DrawingConfig.swift",
"Public/ItemViews/MonthGridBackgroundView.swift",
"Public/ItemViews/MonthHeaderView.swift",
"Public/ItemViews/Shape.swift",
"Public/ItemViews/SwiftUIWrapperView.swift",
"Public/Month.swift",
"Public/MonthLayoutContext.swift",
"Public/MonthRange.swift",
"Public/MonthsLayout.swift",
"Public/OverlaidItemLocation.swift",
"Public/OverlayLayoutContext.swift"
],
"type" : "library"
}
],
"tools_version" : "5.8"
}
{
"project" : {
"configurations" : [
"Debug",
"Release"
],
"name" : "HorizonCalendar",
"schemes" : [
"HorizonCalendar"
],
"targets" : [
"HorizonCalendar",
"HorizonCalendarTests"
]
}
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-26.4.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme HorizonCalendar -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 HorizonCalendar -destination generic/platform=watchOS
2026-04-21 09:59:24.665 xcodebuild[618:3662] Writing error result bundle to /var/folders/xq/y_g06wb113726d38xsyx71_h0000gn/T/ResultBundle_2026-21-04_09-59-0024.xcresult
xcodebuild: error: Unable to find a destination matching the provided destination specifier:
{ generic:1, platform:watchOS }
Available destinations for the "HorizonCalendar" scheme:
{ platform:macOS, arch:arm64, variant:Mac Catalyst, id:1ef160bddd1661afb7ed9ea0750bebc83e2900a3, name:My Mac }
{ platform:macOS, arch:x86_64, variant:Mac Catalyst, id:1ef160bddd1661afb7ed9ea0750bebc83e2900a3, name:My Mac }
{ platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:1ef160bddd1661afb7ed9ea0750bebc83e2900a3, name:My Mac }
{ platform:iOS, id:dvtdevice-DVTiPhonePlaceholder-iphoneos:placeholder, name:Any iOS Device }
{ platform:iOS Simulator, id:dvtdevice-DVTiOSDeviceSimulatorPlaceholder-iphonesimulator:placeholder, name:Any iOS Simulator Device }
{ platform:macOS, variant:Mac Catalyst, name:Any Mac }
{ platform:visionOS Simulator, arch:arm64, variant:Designed for [iPad,iPhone], id:0A65DF41-4C5A-42D8-80FB-C7AD911E0B72, OS:26.4, name:Apple Vision Pro }
{ platform:iOS Simulator, arch:arm64, id:ED6D44FB-E2CB-4753-A0FD-FD31596FEC80, OS:26.4, name:iPad (A16) }
{ platform:iOS Simulator, arch:arm64, id:BCEC8334-6B95-4648-94D6-7CF60E7EFD82, OS:26.4, name:iPad Air 11-inch (M4) }
{ platform:iOS Simulator, arch:arm64, id:45BB79BC-7646-4F19-8D06-DCBD411E98C0, OS:26.4, name:iPad Air 13-inch (M4) }
{ platform:iOS Simulator, arch:arm64, id:1C3FCF57-F496-44A8-91C7-42D1FBB47B6C, OS:26.4, name:iPad Pro 11-inch (M5) }
{ platform:iOS Simulator, arch:arm64, id:78ECA907-6BCE-4638-957D-C2669C42F4B7, OS:26.4, name:iPad Pro 13-inch (M5) }
{ platform:iOS Simulator, arch:arm64, id:4E377BD7-D244-4C67-AA71-C9334B19DD83, OS:26.4, name:iPad mini (A17 Pro) }
{ platform:iOS Simulator, arch:arm64, id:5E07715F-630C-4684-A995-1B2EE7BD6598, OS:26.4, name:iPhone 17 }
{ platform:iOS Simulator, arch:arm64, id:C413B30A-952C-4663-B1C5-64938D82C4AB, OS:26.4, name:iPhone 17 Pro }
{ platform:iOS Simulator, arch:arm64, id:407D5276-A344-478A-B9C8-EB27CE780CB6, OS:26.4, name:iPhone 17 Pro Max }
{ platform:iOS Simulator, arch:arm64, id:720F5E9E-7490-4565-8AC1-7A6A63551BBC, OS:26.4, name:iPhone 17e }
{ platform:iOS Simulator, arch:arm64, id:51B1D6CF-85BF-4B9E-ACCF-FD3A9AD197FF, OS:26.4, name:iPhone Air }
INFRASTRUCTURE ERROR (status: destinationUnavailable