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Track the adoption of Swift 6 strict concurrency checks for data race safety. How many packages are Ready for Swift 6?

Build Information

Failed to build GhostTypewriter with Swift 5.10 for macOS (SPM).

Build Command

env DEVELOPER_DIR=/Applications/Xcode-15.3.0-Beta.2.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
========================================
Builder version: 4.29.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/wibosco/GhostTypewriter.git
Reference: main
Initialized empty Git repository in /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.git/
From https://github.com/wibosco/GhostTypewriter
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 479f5c3 Update README.md
Cloned https://github.com/wibosco/GhostTypewriter.git
Revision (git rev-parse @):
479f5c30f343a1ea1adb4befd762f11116ae1b48
SUCCESS checkout https://github.com/wibosco/GhostTypewriter.git at main
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             5.10
Building package at path:  $workDir
https://github.com/wibosco/GhostTypewriter.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.3.0-Beta.2.app xcrun swift build --arch arm64
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version--423B1241ED78D482.txt
[3/5] Compiling GhostTypewriter TypewriterLabel.swift
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/GhostTypewriter/Label/TypewriterLabel.swift:9:8: error: no such module 'UIKit'
import UIKit
       ^
error: emit-module command failed with exit code 1 (use -v to see invocation)
[4/5] Emitting module GhostTypewriter
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/GhostTypewriter/Label/TypewriterLabel.swift:9:8: error: no such module 'UIKit'
import UIKit
       ^
[5/5] Compiling GhostTypewriter TimerFactory.swift
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/GhostTypewriter/Label/TypewriterLabel.swift:9:8: error: no such module 'UIKit'
import UIKit
       ^
error: fatalError
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version--423B1241ED78D482.txt
[2/4] Compiling GhostTypewriter TimerFactory.swift
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/GhostTypewriter/Label/TypewriterLabel.swift:9:8: error: no such module 'UIKit'
import UIKit
       ^
error: emit-module command failed with exit code 1 (use -v to see invocation)
[3/4] Emitting module GhostTypewriter
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/GhostTypewriter/Label/TypewriterLabel.swift:9:8: error: no such module 'UIKit'
import UIKit
       ^
[4/4] Compiling GhostTypewriter TypewriterLabel.swift
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/GhostTypewriter/Label/TypewriterLabel.swift:9:8: error: no such module 'UIKit'
import UIKit
       ^
error: fatalError
BUILD FAILURE 5.10 macosSpm