Swift Package Index

Build Information

Failed to build swift-prometheus, reference 2.4.1 (3d6fae), with Swift 6.1 for iOS using Xcode 16.3 on 30 Oct 2026 18:53:34 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: 5.1.4
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/swift-server/swift-prometheus.git
Reference: 2.4.1
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/swift-server/swift-prometheus
 * tag               2.4.1      -> FETCH_HEAD
HEAD is now at 3d6fae6 feat: add FreeBSD pthread support to NIOLock (#170)
Cloned https://github.com/swift-server/swift-prometheus.git
Revision (git rev-parse @):
3d6fae674e34f430023e52d7fdfa01cc812e411a
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/swift-server/swift-prometheus.git at 2.4.1
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Build
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Selected platform:         iOS
Swift version:             6.1
Building package at path:  $PWD
https://github.com/swift-server/swift-prometheus.git
https://github.com/swift-server/swift-prometheus.git
error: 'spi-builder-workspace': package 'spi-builder-workspace' is using Swift tools version 6.2.0 but the installed version is 6.1.0
error: fatalError
Command line invocation:
    /Applications/Xcode-16.3.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
package 'spi-builder-workspace' is using Swift tools version 6.2.0 but the installed version is 6.1.0
Resolved source packages:
  spi-builder-workspace: (null)
2026-10-30 11:53:33.566 xcodebuild[505:2906] Writing error result bundle to /var/folders/5k/5yc19ymj0jqd5v0zvgfqz0xw0000gn/T/ResultBundle_2026-30-10_11-53-0033.xcresult
xcodebuild: error: Could not resolve package dependencies:
  package 'spi-builder-workspace' is using Swift tools version 6.2.0 but the installed version is 6.1.0
Command line invocation:
    /Applications/Xcode-16.3.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
package 'spi-builder-workspace' is using Swift tools version 6.2.0 but the installed version is 6.1.0
Resolved source packages:
  spi-builder-workspace: (null)
2026-10-30 11:53:34.313 xcodebuild[514:2994] Writing error result bundle to /var/folders/5k/5yc19ymj0jqd5v0zvgfqz0xw0000gn/T/ResultBundle_2026-30-10_11-53-0034.xcresult
xcodebuild: error: Could not resolve package dependencies:
  package 'spi-builder-workspace' is using Swift tools version 6.2.0 but the installed version is 6.1.0
BUILD FAILURE 6.1 iOS