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Build Information

Failed to build HorizonCalendar, reference v2.0.0 (a360d7), with Swift 6.4 for iOS using Xcode 27.0 on 19 Sep 2026 23:47:56 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme HorizonCalendar -destination generic/platform=iOS

Build Log

========================================
RunAll
========================================
Builder version: 5.1.0
Interrupt handler set up.
========================================
Checkout
========================================
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
========================================
Build
========================================
Selected platform:         iOS
Swift version:             6.4
Building package at path:  $PWD
https://github.com/airbnb/HorizonCalendar.git
Command line invocation:
    /Applications/Xcode-27.0.0-Release.Candidate.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-27.0.0-Release.Candidate.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme HorizonCalendar -destination generic/platform=iOS
Command line invocation:
    /Applications/Xcode-27.0.0-Release.Candidate.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=iOS
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (1 target)
    Target 'HorizonCalendar' in project 'HorizonCalendar' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
ExecuteExternalTool /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -isysroot /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS27.0.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -arch arm64 -isysroot /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS27.0.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc --version
ExecuteExternalTool /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld -version_details
Build description signature: a3191279823b01b22a1a15b417bde8f9
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/a3191279823b01b22a1a15b417bde8f9.xcbuilddata
/Users/admin/builder/spi-builder-workspace/HorizonCalendar.xcodeproj: error: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 11.0, but the range of supported deployment target versions is 15.0 to 27.0.x. (in target 'HorizonCalendar' from project 'HorizonCalendar')
** BUILD FAILED **
The following build commands failed:
	Building project HorizonCalendar with scheme HorizonCalendar
(1 failure)
Command line invocation:
    /Applications/Xcode-27.0.0-Release.Candidate.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-27.0.0-Release.Candidate.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme HorizonCalendar -destination generic/platform=iOS
Command line invocation:
    /Applications/Xcode-27.0.0-Release.Candidate.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=iOS
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (1 target)
    Target 'HorizonCalendar' in project 'HorizonCalendar' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
/Users/admin/builder/spi-builder-workspace/HorizonCalendar.xcodeproj: error: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 11.0, but the range of supported deployment target versions is 15.0 to 27.0.x. (in target 'HorizonCalendar' from project 'HorizonCalendar')
** BUILD FAILED **
The following build commands failed:
	Building project HorizonCalendar with scheme HorizonCalendar
(1 failure)
BUILD FAILURE 6.4 iOS