Swift Package IndexBuild Information
Failed to build SwiftMail, reference 1.16.0 (88c45c), with Swift 6.1 for watchOS using Xcode 16.3 on 12 Oct 2026 10:55:17 UTC.
Build Command
No build command. This typically means the build failed at an early stage where we determine the build command.Build Log
========================================
RunAll
========================================
Builder version: 5.1.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/Cocoanetics/SwiftMail.git
Reference: 1.16.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/Cocoanetics/SwiftMail
* tag 1.16.0 -> FETCH_HEAD
HEAD is now at 88c45cb Keep backslashes in filenames that Outlook writes unescaped (#254)
Cloned https://github.com/Cocoanetics/SwiftMail.git
Revision (git rev-parse @):
88c45cbd31b347b373f7c87e197be63eb95efbc2
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/Cocoanetics/SwiftMail.git at 1.16.0
========================================
Build
========================================
Selected platform: watchOS
Swift version: 6.1
Building package at path: $PWD
https://github.com/Cocoanetics/SwiftMail.git
https://github.com/Cocoanetics/SwiftMail.git
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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
Fetching from https://github.com/apple/swift-nio-imap
package 'swift-nio-imap' @ 14ad3887dab9ca5aba38ee0ace18fddf40e9491f is using Swift tools version 6.2.0 but the installed version is 6.1.0 in https://github.com/apple/swift-nio-imapResolve Package Graph
Updating from https://github.com/apple/swift-nio-imap
package 'swift-nio-imap' @ 14ad3887dab9ca5aba38ee0ace18fddf40e9491f is using Swift tools version 6.2.0 but the installed version is 6.1.0 in https://github.com/apple/swift-nio-imap
Resolved source packages:
spi-builder-workspace: (null)
2026-10-12 03:55:16.131 xcodebuild[530:2994] Writing error result bundle to /var/folders/5k/5yc19ymj0jqd5v0zvgfqz0xw0000gn/T/ResultBundle_2026-12-10_03-55-0016.xcresult
xcodebuild: error: Could not resolve package dependencies:
package 'swift-nio-imap' @ 14ad3887dab9ca5aba38ee0ace18fddf40e9491f is using Swift tools version 6.2.0 but the installed version is 6.1.0 in https://github.com/apple/swift-nio-imap
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
Updating from https://github.com/apple/swift-nio-imap
package 'swift-nio-imap' @ 14ad3887dab9ca5aba38ee0ace18fddf40e9491f is using Swift tools version 6.2.0 but the installed version is 6.1.0 in https://github.com/apple/swift-nio-imap
Resolved source packages:
spi-builder-workspace: (null)
2026-10-12 03:55:17.533 xcodebuild[711:3994] Writing error result bundle to /var/folders/5k/5yc19ymj0jqd5v0zvgfqz0xw0000gn/T/ResultBundle_2026-12-10_03-55-0017.xcresult
xcodebuild: error: Could not resolve package dependencies:
package 'swift-nio-imap' @ 14ad3887dab9ca5aba38ee0ace18fddf40e9491f is using Swift tools version 6.2.0 but the installed version is 6.1.0 in https://github.com/apple/swift-nio-imap
BUILD FAILURE 6.1 watchOS