Swift Package Index

Build Information

Failed to build Grayskull, reference main (253e2c), with Swift 6.4 for macOS (SPM) on 23 Sep 2026 16:49:33 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun swift build --arch arm64

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/wendylabsinc/grayskull-swift.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/wendylabsinc/grayskull-swift
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 253e2ca Pass -fno-modules to Swift on Windows
Submodule path 'grayskull': checked out 'ce269b26e3d507ffbf5781f0521e44d07832d98c'
Submodule 'grayskull' (https://github.com/zserge/grayskull) registered for path 'grayskull'
Cloning into '/Users/admin/builder/spi-builder-workspace/grayskull'...
Cloned https://github.com/wendylabsinc/grayskull-swift.git
Revision (git rev-parse @):
253e2ca90bbfc5733a1460ed3758fd332218e124
SUCCESS checkout https://github.com/wendylabsinc/grayskull-swift.git at main
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Build
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Selected platform:         macosSpm
Swift version:             6.4
Building package at path:  $PWD
https://github.com/wendylabsinc/grayskull-swift.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun swift build --arch arm64
Building for debugging...
[Pre-planning 1 / 95]
[Planning deferred tasks]
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[20 / 29] Grayskull
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[98 / 107] Grayskull
[99 / 107] Grayskull
[104 / 107] Grayskull
error: Build input file cannot be found: '/Users/admin/builder/spi-builder-workspace/.build/out/Products/Debug/CGrayskull.o'. Did you forget to declare this file as an output of a script phase or custom build rule which produces it?
error: Libtool /Users/admin/builder/spi-builder-workspace/.build/out/Products/Debug/libGrayskull.a normal failed with a nonzero exit code. Command line:     cd /Users/admin/builder/spi-builder-workspace
    /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool -static -arch_only arm64 -D -syslibroot /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk -L/Users/admin/builder/spi-builder-workspace/.build/out/Products/Debug -L/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib -filelist /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Grayskull.build/Debug/Grayskull-product-p.build/Objects-normal/arm64/Grayskull.LinkFileList -no_warning_for_no_symbols -dependency_info /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Grayskull.build/Debug/Grayskull-product-p.build/Objects-normal/arm64/Grayskull_libtool_dependency_info.dat -o /Users/admin/builder/spi-builder-workspace/.build/out/Products/Debug/libGrayskull.a
error: Build failed
BUILD FAILURE 6.4 macosSpm