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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 RVS_RetroLEDDisplay 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
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Builder version: 4.29.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/RiftValleySoftware/RVS_RetroLEDDisplay.git
Reference: master
Initialized empty Git repository in /Users/builder/builds/TDmZkXJm/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/.git/
From https://github.com/RiftValleySoftware/RVS_RetroLEDDisplay
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 5660c59 Removed typo.
Cloned https://github.com/RiftValleySoftware/RVS_RetroLEDDisplay.git
Revision (git rev-parse @):
5660c59faf1a5291b9e79e2afd26afdddf798a8e
SUCCESS checkout https://github.com/RiftValleySoftware/RVS_RetroLEDDisplay.git at master
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             5.10
Building package at path:  $workDir
https://github.com/RiftValleySoftware/RVS_RetroLEDDisplay.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
error: emit-module command failed with exit code 1 (use -v to see invocation)
[3/4] Emitting module RVS_RetroLEDDisplay
/Users/builder/builds/TDmZkXJm/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/RVS_RetroLEDDisplay/RVS_RetroLEDDigitalDisplay.swift:25:8: error: no such module 'UIKit'
import UIKit
       ^
[4/4] Compiling RVS_RetroLEDDisplay RVS_RetroLEDDigitalDisplay.swift
/Users/builder/builds/TDmZkXJm/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/RVS_RetroLEDDisplay/RVS_RetroLEDDigitalDisplay.swift:25:8: error: no such module 'UIKit'
import UIKit
       ^
error: fatalError
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version--423B1241ED78D482.txt
error: emit-module command failed with exit code 1 (use -v to see invocation)
[2/3] Emitting module RVS_RetroLEDDisplay
/Users/builder/builds/TDmZkXJm/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/RVS_RetroLEDDisplay/RVS_RetroLEDDigitalDisplay.swift:25:8: error: no such module 'UIKit'
import UIKit
       ^
[3/3] Compiling RVS_RetroLEDDisplay RVS_RetroLEDDigitalDisplay.swift
/Users/builder/builds/TDmZkXJm/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/RVS_RetroLEDDisplay/RVS_RetroLEDDigitalDisplay.swift:25:8: error: no such module 'UIKit'
import UIKit
       ^
error: fatalError
BUILD FAILURE 5.10 macosSpm