Swift Package Index

Build Information

Failed to build FSCalendar, reference master (df53e7), with Swift 6.3 for Linux on 21 Apr 2026 11:20:50 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-2":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:basic-6.3-latest swift build --triple x86_64-unknown-linux-gnu 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.70.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/WenchaoD/FSCalendar.git
Reference: master
Initialized empty Git repository in /host/spi-builder-workspace/.git/
hint: Using 'master' as the name for the initial branch. This default branch name
hint: is subject to change. To configure the initial branch name to use in all
hint: of your new repositories, which will suppress this warning, call:
hint:
hint: 	git config --global init.defaultBranch <name>
hint:
hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
hint: 'development'. The just-created branch can be renamed via this command:
hint:
hint: 	git branch -m <name>
From https://github.com/WenchaoD/FSCalendar
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at df53e79 Merge pull request #1422 from wlxo0401/master
Cloned https://github.com/WenchaoD/FSCalendar.git
Revision (git rev-parse @):
df53e79c324ea5f9e3dcb03b35b2b324de901205
SUCCESS checkout https://github.com/WenchaoD/FSCalendar.git at master
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.3
Building package at path:  $PWD
https://github.com/WenchaoD/FSCalendar.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-2":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:basic-6.3-latest swift build --triple x86_64-unknown-linux-gnu 2>&1
basic-6.3-latest: Pulling from swiftpackageindex/spi-images
Digest: sha256:5a7d791d2ead8a924b1292cb31bf3288eabcfe8880e0b005b00b45b71a5bc36a
Status: Image is up to date for registry.gitlab.com/swiftpackageindex/spi-images:basic-6.3-latest
Building for debugging...
In file included from /host/spi-builder-workspace/FSCalendar/FSCalendarTransitionCoordinator.m:9:
In file included from /host/spi-builder-workspace/FSCalendar/FSCalendarTransitionCoordinator.h:9:
/host/spi-builder-workspace/FSCalendar/FSCalendar.h:18:9: fatal error: 'UIKit/UIKit.h' file not found
   18 | #import <UIKit/UIKit.h>
      |         ^~~~~~~~~~~~~~~
1 error generated.
[0/15] Compiling FSCalendar FSCalendarTransitionCoordinator.m
[0/15] Compiling FSCalendar FSCalendar.m
In file included from /host/spi-builder-workspace/FSCalendar/FSCalendarCalculator.m:9:
/host/spi-builder-workspace/FSCalendar/FSCalendar.h:18:9: fatal error: 'UIKit/UIKit.h' file not found
   18 | #import <UIKit/UIKit.h>
      |         ^~~~~~~~~~~~~~~
1 error generated.
[0/15] Compiling FSCalendar FSCalendarCalculator.m
[0/15] Compiling FSCalendar FSCalendarStickyHeader.m
In file included from /host/spi-builder-workspace/FSCalendar/FSCalendarAppearance.m:11:
In file included from /host/spi-builder-workspace/FSCalendar/FSCalendarAppearance.h:11:
/host/spi-builder-workspace/FSCalendar/FSCalendarConstants.h:11:9: fatal error: 'UIKit/UIKit.h' file not found
   11 | #import <UIKit/UIKit.h>
      |         ^~~~~~~~~~~~~~~
1[0/15] Compiling FSCalendar FSCalendarAppearance.m
In file included from /host/spi-builder-workspace/FSCalendar/FSCalendarCollectionViewLayout.m:9:
/host/spi-builder-workspace/FSCalendar/FSCalendarCollectionViewLayout.h:9:9: fatal error: 'UIKit/UIKit.h' file not found
    9 | #import <UIKit/UIKit.h>
      |         ^~~~~~~~~~~~~~~
[0/15] Compiling FSCalendar FSCalendarCollectionViewLayout.m
In file included from /host/spi-builder-workspace/FSCalendar/FSCalendarCell.m:9:
/host/spi-builder-workspace/FSCalendar/FSCalendarCell.h:9:9: fatal error: 'UIKit/UIKit.h' file not found
    9 | #import <UIKit/UIKit.h>
      |         ^~~~~~~~~~~~~~~
1 error generated.
[0/15] Compiling FSCalendar FSCalendarCell.m
In file included from /host/spi-builder-workspace/FSCalendar/FSCalendarWeekdayView.m:9:
/host/spi-builder-workspace/FSCalendar/FSCalendarWeekdayView.h:9:9: fatal error: 'UIKit/UIKit.h' file not found
    9 | #import <UIKit/UIKit.h>
      |         ^~~~~~~~~~~~~~~
1 error generated.
[0/15] Compiling FSCalendar FSCalendarWeekdayView.m
BUILD FAILURE 6.3 linux