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Build Information

Failed to build HorizonCalendar, reference master (257927), with Swift 6.1 for macOS (SPM) on 4 Sep 2026 11:02:56 UTC.

Build Command

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

Build Log

========================================
RunAll
========================================
Builder version: 5.0.2
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 2579274 Fix layout crash when the visible range changes (#348)
Cloned https://github.com/airbnb/HorizonCalendar.git
Revision (git rev-parse @):
257927434aecbc4a70163570b5ef40976f0428a2
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",
        "CalendarScrollViewTests.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
[1/1] Compiling plugin FormatSwift
[2/2] Compiling plugin GenerateManual
[3/3] Compiling plugin GenerateDoccReference
Building for debugging...
[3/5] Write sources
[4/5] Write swift-version-2F0A5646E1D333AE.txt
error: emit-module command failed with exit code 1 (use -v to see invocation)
[6/48] Emitting module HorizonCalendar
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[7/52] Compiling HorizonCalendar DayView.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[8/52] Compiling HorizonCalendar DrawingConfig.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[9/52] Compiling HorizonCalendar MonthGridBackgroundView.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[10/52] Compiling HorizonCalendar MonthHeaderView.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[11/52] Compiling HorizonCalendar CGFloat+MaxLayoutValue.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[12/52] Compiling HorizonCalendar Calendar+Helpers.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[13/52] Compiling HorizonCalendar CalendarScrollView.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[14/52] Compiling HorizonCalendar ColorViewRepresentable.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[15/52] Compiling HorizonCalendar Dictionary+MutatingValueForKey.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[16/52] Compiling HorizonCalendar DayRange.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[17/52] Compiling HorizonCalendar DayRangeLayoutContext.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[18/52] Compiling HorizonCalendar DaysOfTheWeekRowSeparatorOptions.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[19/52] Compiling HorizonCalendar DayOfWeekView.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[20/52] Compiling HorizonCalendar MonthRange.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[21/52] Compiling HorizonCalendar MonthsLayout.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[22/52] Compiling HorizonCalendar OverlaidItemLocation.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[23/52] Compiling HorizonCalendar OverlayLayoutContext.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[24/52] Compiling HorizonCalendar AnyCalendarItemModel.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[25/52] Compiling HorizonCalendar CalendarItemModel.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[26/52] Compiling HorizonCalendar CalendarItemViewRepresentable.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[27/52] Compiling HorizonCalendar CalendarView.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[28/52] Compiling HorizonCalendar CalendarViewContent.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[29/52] Compiling HorizonCalendar Shape.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[30/52] Compiling HorizonCalendar SwiftUIWrapperView.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[31/52] Compiling HorizonCalendar Month.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[32/52] Compiling HorizonCalendar MonthLayoutContext.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[33/52] Compiling HorizonCalendar LayoutItem.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[34/52] Compiling HorizonCalendar LayoutItemTypeEnumerator.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[35/52] Compiling HorizonCalendar PaginationHelpers.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[36/52] Compiling HorizonCalendar ScreenPixelAlignment.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[37/52] Compiling HorizonCalendar ScrollMetricsMutator.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[38/52] Compiling HorizonCalendar ScrollToItemContext.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[39/52] Compiling HorizonCalendar SubviewInsertionIndexTracker.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[40/52] Compiling HorizonCalendar UIView+NoAnimation.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[41/52] Compiling HorizonCalendar VisibleItem.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[42/52] Compiling HorizonCalendar VisibleItemsProvider.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[43/52] Compiling HorizonCalendar DoubleLayoutPassHelpers.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[44/52] Compiling HorizonCalendar FrameProvider.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[45/52] Compiling HorizonCalendar Hasher+CGRect.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[46/52] Compiling HorizonCalendar ItemView.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[47/52] Compiling HorizonCalendar ItemViewReuseManager.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[48/52] Compiling HorizonCalendar CalendarViewProxy.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[49/52] Compiling HorizonCalendar CalendarViewRepresentable.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[50/52] Compiling HorizonCalendar CalendarViewScrollPosition.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[51/52] Compiling HorizonCalendar Day.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[52/52] Compiling HorizonCalendar DayOfWeekPosition.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
Fetching https://github.com/airbnb/swift
[1/5493] Fetching swift
Fetched https://github.com/airbnb/swift from cache (10.78s)
Computing version for https://github.com/airbnb/swift
Computed https://github.com/airbnb/swift at 1.2.0 (14.06s)
Fetching https://github.com/apple/swift-argument-parser from cache
Fetched https://github.com/apple/swift-argument-parser from cache (1.81s)
Computing version for https://github.com/apple/swift-argument-parser
Computed https://github.com/apple/swift-argument-parser at 1.8.2 (2.36s)
Creating working copy for https://github.com/apple/swift-argument-parser
Working copy of https://github.com/apple/swift-argument-parser resolved at 1.8.2
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
[10471/11034045] Downloading https://github.com/realm/SwiftLint/releases/download/0.55.1/SwiftLintBinary-macos.artifactbundle.zip
[4732277/57305396] Downloading https://github.com/realm/SwiftLint/releases/download/0.55.1/SwiftLintBinary-macos.artifactbundle.zip, https://github.com/calda/SwiftFormat-nightly/releases/download/2025-12-20/SwiftFormat.artifactbundle.zip
Downloaded https://github.com/realm/SwiftLint/releases/download/0.55.1/SwiftLintBinary-macos.artifactbundle.zip (1.01s)
Downloaded https://github.com/calda/SwiftFormat-nightly/releases/download/2025-12-20/SwiftFormat.artifactbundle.zip (2.54s)
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64
[0/1] Planning build
[1/1] Compiling plugin FormatSwift
[2/2] Compiling plugin GenerateManual
[3/3] Compiling plugin GenerateDoccReference
Building for debugging...
[3/4] Write swift-version-2F0A5646E1D333AE.txt
[5/47] Compiling HorizonCalendar CGFloat+MaxLayoutValue.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[6/47] Compiling HorizonCalendar Calendar+Helpers.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[7/47] Compiling HorizonCalendar CalendarScrollView.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[8/47] Compiling HorizonCalendar ColorViewRepresentable.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[9/47] Compiling HorizonCalendar Dictionary+MutatingValueForKey.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
error: emit-module command failed with exit code 1 (use -v to see invocation)
[10/51] Emitting module HorizonCalendar
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[11/51] Compiling HorizonCalendar Shape.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[12/51] Compiling HorizonCalendar SwiftUIWrapperView.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[13/51] Compiling HorizonCalendar Month.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[14/51] Compiling HorizonCalendar MonthLayoutContext.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[15/51] Compiling HorizonCalendar CalendarViewProxy.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[16/51] Compiling HorizonCalendar CalendarViewRepresentable.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[17/51] Compiling HorizonCalendar CalendarViewScrollPosition.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[18/51] Compiling HorizonCalendar Day.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[19/51] Compiling HorizonCalendar DayOfWeekPosition.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[20/51] Compiling HorizonCalendar DayView.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[21/51] Compiling HorizonCalendar DrawingConfig.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[22/51] Compiling HorizonCalendar MonthGridBackgroundView.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[23/51] Compiling HorizonCalendar MonthHeaderView.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[24/51] Compiling HorizonCalendar LayoutItem.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[25/51] Compiling HorizonCalendar LayoutItemTypeEnumerator.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[26/51] Compiling HorizonCalendar PaginationHelpers.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[27/51] Compiling HorizonCalendar ScreenPixelAlignment.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[28/51] Compiling HorizonCalendar ScrollMetricsMutator.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[29/51] Compiling HorizonCalendar MonthRange.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[30/51] Compiling HorizonCalendar MonthsLayout.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[31/51] Compiling HorizonCalendar OverlaidItemLocation.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[32/51] Compiling HorizonCalendar OverlayLayoutContext.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[33/51] Compiling HorizonCalendar DayRange.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[34/51] Compiling HorizonCalendar DayRangeLayoutContext.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[35/51] Compiling HorizonCalendar DaysOfTheWeekRowSeparatorOptions.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[36/51] Compiling HorizonCalendar DayOfWeekView.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[37/51] Compiling HorizonCalendar AnyCalendarItemModel.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[38/51] Compiling HorizonCalendar CalendarItemModel.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[39/51] Compiling HorizonCalendar CalendarItemViewRepresentable.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[40/51] Compiling HorizonCalendar CalendarView.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[41/51] Compiling HorizonCalendar CalendarViewContent.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[42/51] Compiling HorizonCalendar ScrollToItemContext.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[43/51] Compiling HorizonCalendar SubviewInsertionIndexTracker.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[44/51] Compiling HorizonCalendar UIView+NoAnimation.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[45/51] Compiling HorizonCalendar VisibleItem.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[46/51] Compiling HorizonCalendar VisibleItemsProvider.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[47/51] Compiling HorizonCalendar DoubleLayoutPassHelpers.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[48/51] Compiling HorizonCalendar FrameProvider.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[49/51] Compiling HorizonCalendar Hasher+CGRect.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[50/51] Compiling HorizonCalendar ItemView.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
[51/51] Compiling HorizonCalendar ItemViewReuseManager.swift
/Users/admin/builder/spi-builder-workspace/Sources/Internal/CalendarScrollView.swift:16:8: error: no such module 'UIKit'
14 | // limitations under the License.
15 |
16 | import UIKit
   |        `- error: no such module 'UIKit'
17 |
18 | /// A scroll view with altered behavior to better fit the needs of `CalendarView`.
warning: 'spi-builder-workspace': found 1 file(s) which are unhandled; explicitly declare them as resources or exclude from the target
    /Users/admin/builder/spi-builder-workspace/Tests/Info.plist
BUILD FAILURE 6.1 macosSpm