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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 MessagePackReferenceImplementation with Swift 5.9 for macOS (Xcode) using Xcode 15.2.

Build Command

env DEVELOPER_DIR="/Applications/Xcode-15.0.0-Beta.2.app" xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride="$PWD/.dependencies" -derivedDataPath "$PWD/.derivedData" build -scheme MessagePackReferenceImplementation -destination 'platform=macos,arch=arm64'

Build Log

<?xml version="1.0" encoding="UTF-8"?>
<Error><Code>AccessDenied</Code><Message>Access Denied</Message><RequestId>NV4B8MP8A8MHVYRD</RequestId><HostId>BaFjZNFjKqyoNKeZMXYRM+mthjqHUC/f2QJWD3vAxscavyfnRXpR7hl4sCZZ4uUECFtRsVG3EkucdZ5x0S1NkQ==</HostId></Error>