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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: develop
Initialized empty Git repository in /Users/admin/builds/J1XnyXFH/0/finestructure/swiftpackageindex-builder/spi-builder-workspace/.git/
From https://github.com/cafielo/MNISTKit
 * branch            develop    -> FETCH_HEAD
 * [new branch]      develop    -> origin/develop
HEAD is now at 0702b14 remove forced unwrapping #4
Cloned https://github.com/cafielo/MNISTKit.git
Revision (git rev-parse @):
0702b1438e41eb502e1684b1b9c4d6301c773c20
SUCCESS checkout https://github.com/cafielo/MNISTKit.git at develop
========================================
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