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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 ParkKit, reference 0.4.0 (cd5bfb), with Swift 6.1 for macOS (SPM) on 24 Apr 2025 10:29:39 UTC.

Build Command

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

Build Log

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RunAll
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Builder version: 4.61.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/kiliankoe/ParkKit.git
Reference: 0.4.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/kiliankoe/ParkKit
 * tag               0.4.0      -> FETCH_HEAD
HEAD is now at cd5bfb6 bump version to 0.4.0
Cloned https://github.com/kiliankoe/ParkKit.git
Revision (git rev-parse @):
cd5bfb628c6ef0527833582a36917c604f568d5a
SUCCESS checkout https://github.com/kiliankoe/ParkKit.git at 0.4.0
error: 'spi-builder-workspace': package 'package.swift' is using Swift tools version 3.1.0 which is no longer supported; consider using '// swift-tools-version: 6.1' to specify the current tools version
========================================
Build
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Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/kiliankoe/ParkKit.git
https://github.com/kiliankoe/ParkKit.git
error: 'spi-builder-workspace': package 'package.swift' is using Swift tools version 3.1.0 which is no longer supported; consider using '// swift-tools-version: 6.1' to specify the current tools version
error: fatalError
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
error: 'spi-builder-workspace': package 'package.swift' is using Swift tools version 3.1.0 which is no longer supported; consider using '// swift-tools-version: 6.1' to specify the current tools version
error: 'spi-builder-workspace': package 'package.swift' is using Swift tools version 3.1.0 which is no longer supported; consider using '// swift-tools-version: 6.1' to specify the current tools version
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64
error: 'spi-builder-workspace': package 'package.swift' is using Swift tools version 3.1.0 which is no longer supported; consider using '// swift-tools-version: 6.1' to specify the current tools version
error: 'spi-builder-workspace': package 'package.swift' is using Swift tools version 3.1.0 which is no longer supported; consider using '// swift-tools-version: 6.1' to specify the current tools version
BUILD FAILURE 6.1 macosSpm