Swift Package Index

Build Information

Failed to build flock, reference 0.1.0 (d2d9d5), with Swift 6.4 for iOS using Xcode 27.0 on 15 Sep 2026 18:37:22 UTC.

Build Command

No build command. This typically means the build failed at an early stage where we determine the build command.

Build Log

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RunAll
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Builder version: 5.1.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/naoty/flock.git
Reference: 0.1.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/naoty/flock
 * tag               0.1.0      -> FETCH_HEAD
HEAD is now at d2d9d55 Add Makefile
Cloned https://github.com/naoty/flock.git
Revision (git rev-parse @):
d2d9d55b2ffef1a7587ed5df182f4bedafb7dcc3
SUCCESS checkout https://github.com/naoty/flock.git at 0.1.0
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Build
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Selected platform:         iOS
Swift version:             6.4
Building package at path:  $PWD
https://github.com/naoty/flock.git
Command line invocation:
    /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
package 'package.swift' is using Swift tools version 3.1.0 which is no longer supported; consider using '// swift-tools-version: 6.4' to specify the current tools version
Resolved source packages:
  spi-builder-workspace: (null)
2026-09-15 14:37:20.031 xcodebuild[529:3026] Writing error result bundle to /var/folders/xq/y_g06wb113726d38xsyx71_h0000gn/T/ResultBundle_2026-15-09_14-37-0020.xcresult
xcodebuild: error: Could not resolve package dependencies:
  package 'package.swift' is using Swift tools version 3.1.0 which is no longer supported; consider using '// swift-tools-version: 6.4' to specify the current tools version
Command line invocation:
    /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
package 'package.swift' is using Swift tools version 3.1.0 which is no longer supported; consider using '// swift-tools-version: 6.4' to specify the current tools version
Resolved source packages:
  spi-builder-workspace: (null)
2026-09-15 14:37:22.021 xcodebuild[585:3504] Writing error result bundle to /var/folders/xq/y_g06wb113726d38xsyx71_h0000gn/T/ResultBundle_2026-15-09_14-37-0022.xcresult
xcodebuild: error: Could not resolve package dependencies:
  package 'package.swift' is using Swift tools version 3.1.0 which is no longer supported; consider using '// swift-tools-version: 6.4' to specify the current tools version
BUILD FAILURE 6.4 iOS