Swift Package Index

Build Information

Failed to build HorizonCalendar, reference master (47e451), with Swift 6.1 for macOS (SPM) on 9 Feb 2026 04:47:48 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
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Builder version: 4.68.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/airbnb/HorizonCalendar.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/airbnb/HorizonCalendar
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 47e451e Fix README links
Cloned https://github.com/airbnb/HorizonCalendar.git
Revision (git rev-parse @):
47e451e840a6b849a0b0f136e4340f5834767ed2
SUCCESS checkout https://github.com/airbnb/HorizonCalendar.git at master
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/airbnb/HorizonCalendar.git
https://github.com/airbnb/HorizonCalendar.git
{
  "dependencies" : [
    {
      "identity" : "swift",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.2.0",
            "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" : "12.0"
    }
  ],
  "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" : "5.8.1"
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures
Fetching https://github.com/airbnb/swift
[1/4910] Fetching swift
Fetched https://github.com/airbnb/swift from cache (2.38s)
Computing version for https://github.com/airbnb/swift
Computed https://github.com/airbnb/swift at 1.2.0 (5.53s)
Fetching https://github.com/apple/swift-argument-parser from cache
Fetched https://github.com/apple/swift-argument-parser from cache (1.36s)
Computing version for https://github.com/apple/swift-argument-parser
Computed https://github.com/apple/swift-argument-parser at 1.7.0 (1.89s)
Creating working copy for https://github.com/apple/swift-argument-parser
Working copy of https://github.com/apple/swift-argument-parser resolved at 1.7.0
Creating working copy for https://github.com/airbnb/swift
Working copy of https://github.com/airbnb/swift resolved at 1.2.0
Downloading binary artifact https://github.com/calda/SwiftFormat-nightly/releases/download/2025-12-20/SwiftFormat.artifactbundle.zip
Downloading binary artifact https://github.com/realm/SwiftLint/releases/download/0.55.1/SwiftLintBinary-macos.artifactbundle.zip
[2513/55124] Downloading https://github.com/calda/SwiftFormat-nightly/releases/download/2025-12-20/SwiftFormat.artifactbundle.zip
[18888/11089169] Downloading https://github.com/calda/SwiftFormat-nightly/releases/download/2025-12-20/SwiftFormat.artifactbundle.zip, https://github.com/realm/SwiftLint/releases/download/0.55.1/SwiftLintBinary-macos.artifactbundle.zip
error: failed downloading 'https://github.com/calda/SwiftFormat-nightly/releases/download/2025-12-20/SwiftFormat.artifactbundle.zip' which is required by binary target 'swiftformat': /Users/admin/Library/Caches/org.swift.swiftpm/artifacts/https___github_com_calda_SwiftFormat_nightly_releases_download_2025_12_20_SwiftFormat_artifactbundle_zip already exists in file system
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64
Downloading binary artifact https://github.com/calda/SwiftFormat-nightly/releases/download/2025-12-20/SwiftFormat.artifactbundle.zip
Fetching binary artifact https://github.com/realm/SwiftLint/releases/download/0.55.1/SwiftLintBinary-macos.artifactbundle.zip from cache
[6841/55124] Downloading https://github.com/calda/SwiftFormat-nightly/releases/download/2025-12-20/SwiftFormat.artifactbundle.zip
Fetched https://github.com/realm/SwiftLint/releases/download/0.55.1/SwiftLintBinary-macos.artifactbundle.zip from cache (0.46s)
error: failed downloading 'https://github.com/calda/SwiftFormat-nightly/releases/download/2025-12-20/SwiftFormat.artifactbundle.zip' which is required by binary target 'swiftformat': /Users/admin/Library/Caches/org.swift.swiftpm/artifacts/https___github_com_calda_SwiftFormat_nightly_releases_download_2025_12_20_SwiftFormat_artifactbundle_zip already exists in file system
BUILD FAILURE 6.1 macosSpm