Swift Package Index

Build Information

Failed to build HorizonCalendar, reference master (47e451), with Swift 6.2 for macOS (SPM) on 9 Feb 2026 04:47:49 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-26.0.0.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
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Builder version: 4.68.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/airbnb/HorizonCalendar.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/airbnb/HorizonCalendar
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 47e451e Fix README links
Cloned https://github.com/airbnb/HorizonCalendar.git
Revision (git rev-parse @):
47e451e840a6b849a0b0f136e4340f5834767ed2
SUCCESS checkout https://github.com/airbnb/HorizonCalendar.git at master
Fetching https://github.com/airbnb/swift
Fetching https://github.com/apple/swift-argument-parser
[1/4910] Fetching swift
[1327/22081] Fetching swift, swift-argument-parser
Fetched https://github.com/apple/swift-argument-parser from cache (2.44s)
Fetched https://github.com/airbnb/swift from cache (2.44s)
Computing version for https://github.com/airbnb/swift
Computed https://github.com/airbnb/swift at 1.2.0 (5.19s)
Computing version for https://github.com/apple/swift-argument-parser
Computed https://github.com/apple/swift-argument-parser at 1.2.3 (0.64s)
Creating working copy for https://github.com/airbnb/swift
Working copy of https://github.com/airbnb/swift resolved at 1.2.0
Creating working copy for https://github.com/apple/swift-argument-parser
Working copy of https://github.com/apple/swift-argument-parser resolved at 1.2.3
Downloading binary artifact https://github.com/realm/SwiftLint/releases/download/0.55.1/SwiftLintBinary-macos.artifactbundle.zip
Downloading binary artifact https://github.com/calda/SwiftFormat-nightly/releases/download/2025-12-20/SwiftFormat.artifactbundle.zip
[6841/55124] Downloading https://github.com/calda/SwiftFormat-nightly/releases/download/2025-12-20/SwiftFormat.artifactbundle.zip
[64072/11089169] Downloading https://github.com/calda/SwiftFormat-nightly/releases/download/2025-12-20/SwiftFormat.artifactbundle.zip, https://github.com/realm/SwiftLint/releases/download/0.55.1/SwiftLintBinary-macos.artifactbundle.zip
error: failed downloading 'https://github.com/calda/SwiftFormat-nightly/releases/download/2025-12-20/SwiftFormat.artifactbundle.zip' which is required by binary target 'swiftformat': /Users/admin/Library/Caches/org.swift.swiftpm/artifacts/https___github_com_calda_SwiftFormat_nightly_releases_download_2025_12_20_SwiftFormat_artifactbundle_zip already exists in file system
error: fatalError
========================================
Build
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Selected platform:         macosSpm
Swift version:             6.2
Building package at path:  $PWD
https://github.com/airbnb/HorizonCalendar.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-26.0.0.app xcrun swift build --arch arm64
Downloading binary artifact https://github.com/calda/SwiftFormat-nightly/releases/download/2025-12-20/SwiftFormat.artifactbundle.zip
[4101/55124] Downloading https://github.com/calda/SwiftFormat-nightly/releases/download/2025-12-20/SwiftFormat.artifactbundle.zip
error: failed downloading 'https://github.com/calda/SwiftFormat-nightly/releases/download/2025-12-20/SwiftFormat.artifactbundle.zip' which is required by binary target 'swiftformat': /Users/admin/Library/Caches/org.swift.swiftpm/artifacts/https___github_com_calda_SwiftFormat_nightly_releases_download_2025_12_20_SwiftFormat_artifactbundle_zip already exists in file system
BUILD FAILURE 6.2 macosSpm