Swift Package Index

Build Information

Failed to build MailCore2, reference master (7417b2), with Swift 6.3 for watchOS using Xcode 26.4 on 21 Apr 2026 09:07:05 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-26.4.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme MailCore2 -destination generic/platform=watchOS

Build Log

========================================
RunAll
========================================
Builder version: 4.70.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/MailCore/mailcore2.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/MailCore/mailcore2
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 7417b2e Merge pull request #1951 from beczesz/bugfix/1947
Submodule path 'deps/ctemplate': checked out 'd004783679560176f501998fd620f50acfc233f0'
Submodule path 'deps/libetpan': checked out '6dc099a813344ee9c48009d70a78016ae838afcc'
Submodule path 'deps/tidy-html5': checked out '10c3674befa76f0f8c56e2944959a0ba9e1ef638'
Submodule 'deps/ctemplate' (https://github.com/dinhviethoa/ctemplate) registered for path 'deps/ctemplate'
Submodule 'deps/libetpan' (https://github.com/dinhviethoa/libetpan.git) registered for path 'deps/libetpan'
Submodule 'deps/tidy-html5' (https://github.com/dinhvh/tidy-html5.git) registered for path 'deps/tidy-html5'
Cloning into '/Users/admin/builder/spi-builder-workspace/deps/ctemplate'...
Cloning into '/Users/admin/builder/spi-builder-workspace/deps/libetpan'...
Cloning into '/Users/admin/builder/spi-builder-workspace/deps/tidy-html5'...
Cloned https://github.com/MailCore/mailcore2.git
Revision (git rev-parse @):
7417b2e8dd7e2c028aadb72056e4d1428c0627c4
SUCCESS checkout https://github.com/MailCore/mailcore2.git at master
========================================
Build
========================================
Selected platform:         watchOS
Swift version:             6.3
Building package at path:  $PWD
https://github.com/MailCore/mailcore2.git
Command line invocation:
    /Applications/Xcode-26.4.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Resolve Package Graph
Resolved source packages:
  MailCore2: /Users/admin/builder/spi-builder-workspace
resolved source packages: MailCore2
2026-04-21 05:06:49.378 xcodebuild[593:3200] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "MailCore2",
  "name" : "MailCore2",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "9.0"
    },
    {
      "name" : "macos",
      "version" : "10.10"
    }
  ],
  "products" : [
    {
      "name" : "MailCore2",
      "targets" : [
        "MailCore2"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "MailCore2",
      "module_type" : "BinaryTarget",
      "name" : "MailCore2",
      "path" : "remote/archive/MailCore2-2020-09-24.xcframework.zip",
      "product_memberships" : [
        "MailCore2"
      ],
      "sources" : [
      ],
      "type" : "binary"
    }
  ],
  "tools_version" : "5.3"
}
{
  "workspace" : {
    "name" : "spi-builder-workspace",
    "schemes" : [
      "MailCore2"
    ]
  }
}
2026-04-21 05:06:57.398 xcodebuild[713:3997] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-26.4.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme MailCore2 -destination generic/platform=watchOS
Command line invocation:
    /Applications/Xcode-26.4.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath /Users/admin/builder/spi-builder-workspace/.derivedData build -scheme MailCore2 -destination generic/platform=watchOS
Resolve Package Graph
Resolved source packages:
  MailCore2: /Users/admin/builder/spi-builder-workspace
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (1 target)
    Target 'MailCore2' in project 'MailCore2' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -isysroot /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -x c -c /dev/null
Build description signature: 56499ed1bdbf04ca1194839db29c7c7e
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/56499ed1bdbf04ca1194839db29c7c7e.xcbuilddata
/Users/admin/builder/spi-builder-workspace/.dependencies/artifacts/spi-builder-workspace/MailCore2/MailCore2.xcframework:1:1: error: While building for watchOS, no library for this platform was found in '/Users/admin/builder/spi-builder-workspace/.dependencies/artifacts/spi-builder-workspace/MailCore2/MailCore2.xcframework'. (in target 'MailCore2' from project 'MailCore2')
2026-04-21 05:06:59.216 xcodebuild[720:4060] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
** BUILD FAILED **
The following build commands failed:
	Building workspace spi-builder-workspace with scheme MailCore2
(1 failure)
Command line invocation:
    /Applications/Xcode-26.4.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Resolved source packages:
  MailCore2: /Users/admin/builder/spi-builder-workspace
resolved source packages: MailCore2
2026-04-21 05:07:01.635 xcodebuild[737:4173] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "MailCore2",
  "name" : "MailCore2",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "9.0"
    },
    {
      "name" : "macos",
      "version" : "10.10"
    }
  ],
  "products" : [
    {
      "name" : "MailCore2",
      "targets" : [
        "MailCore2"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "MailCore2",
      "module_type" : "BinaryTarget",
      "name" : "MailCore2",
      "path" : "remote/archive/MailCore2-2020-09-24.xcframework.zip",
      "product_memberships" : [
        "MailCore2"
      ],
      "sources" : [
      ],
      "type" : "binary"
    }
  ],
  "tools_version" : "5.3"
}
{
  "workspace" : {
    "name" : "spi-builder-workspace",
    "schemes" : [
      "MailCore2"
    ]
  }
}
2026-04-21 05:07:03.331 xcodebuild[748:4267] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-26.4.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme MailCore2 -destination generic/platform=watchOS
Command line invocation:
    /Applications/Xcode-26.4.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath /Users/admin/builder/spi-builder-workspace/.derivedData build -scheme MailCore2 -destination generic/platform=watchOS
Resolve Package Graph
Resolved source packages:
  MailCore2: /Users/admin/builder/spi-builder-workspace
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (1 target)
    Target 'MailCore2' in project 'MailCore2' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -isysroot /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -x c -c /dev/null
Build description signature: 56499ed1bdbf04ca1194839db29c7c7e
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/56499ed1bdbf04ca1194839db29c7c7e.xcbuilddata
/Users/admin/builder/spi-builder-workspace/.dependencies/artifacts/spi-builder-workspace/MailCore2/MailCore2.xcframework:1:1: error: While building for watchOS, no library for this platform was found in '/Users/admin/builder/spi-builder-workspace/.dependencies/artifacts/spi-builder-workspace/MailCore2/MailCore2.xcframework'. (in target 'MailCore2' from project 'MailCore2')
2026-04-21 05:07:04.722 xcodebuild[783:4560] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
** BUILD FAILED **
The following build commands failed:
	Building workspace spi-builder-workspace with scheme MailCore2
(1 failure)
BUILD FAILURE 6.3 watchOS