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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 mpg123-binary-xcframework with Swift 5.9 for macOS (SPM).

Build Command

env DEVELOPER_DIR=/Applications/Xcode-15.2.0.app xcrun swift build --arch arm64

Build Log

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RunAll
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Builder version: 4.40.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/sbooth/mpg123-binary-xcframework.git
Reference: 0.1.0
Initialized empty Git repository in /Users/builder/builds/TDmZkXJm/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/.git/
From https://github.com/sbooth/mpg123-binary-xcframework
 * tag               0.1.0      -> FETCH_HEAD
HEAD is now at 508567b Initial commit
Cloned https://github.com/sbooth/mpg123-binary-xcframework.git
Revision (git rev-parse @):
508567bf7763f15c988ff6c062679f3403e1dac4
SUCCESS checkout https://github.com/sbooth/mpg123-binary-xcframework.git at 0.1.0
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Build
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Selected platform:         macosSpm
Swift version:             5.9
Building package at path:  $workDir
https://github.com/sbooth/mpg123-binary-xcframework.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.2.0.app xcrun swift build --arch arm64
Downloading binary artifact https://github.com/sbooth/mpg123-binary-xcframework/releases/download/0.1.0/mpg123.xcframework.zip
[20509/3397856] Downloading https://github.com/sbooth/mpg123-binary-xcframework/releases/download/0.1.0/mpg123.xcframework.zip
Downloaded https://github.com/sbooth/mpg123-binary-xcframework/releases/download/0.1.0/mpg123.xcframework.zip (0.41s)
error: The package does not contain a buildable target.
Add at least one `.target` or `.executableTarget` to your `Package.swift`.
BUILD FAILURE 5.9 macosSpm