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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 MNISTKit 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

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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/cafielo/MNISTKit.git
Reference: 1.0.0
Initialized empty Git repository in /Users/builder/builds/UKfvDsi8u/0/finestructure/swiftpackageindex-builder/spi-builder-workspace/.git/
From https://github.com/cafielo/MNISTKit
 * tag               1.0.0      -> FETCH_HEAD
HEAD is now at 2bf6804 Merge branch 'release/1.0.0'
Cloned https://github.com/cafielo/MNISTKit.git
Revision (git rev-parse @):
2bf6804b80f64c471970232b3b3aecdbe9224400
SUCCESS checkout https://github.com/cafielo/MNISTKit.git at 1.0.0
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Build
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Selected platform:         macosSpm
Swift version:             5.10
Building package at path:  $workDir
https://github.com/cafielo/MNISTKit.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.3.0-Beta.2.app xcrun swift build --arch arm64
error: 'spi-builder-workspace': Source files for target MNISTKit should be located under 'Sources/MNISTKit', or a custom sources path can be set with the 'path' property in Package.swift
error: 'spi-builder-workspace': Source files for target MNISTKit should be located under 'Sources/MNISTKit', or a custom sources path can be set with the 'path' property in Package.swift
BUILD FAILURE 5.10 macosSpm