Swift Package Index

Build Information

Failed to build MockDuck, reference main (4729d1), with Swift 6.4 for macOS (Xcode) using Xcode 27.0 on 17 Sep 2026 02:07:13 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme MockDuck -destination platform=macOS,arch=arm64

Build Log

========================================
RunAll
========================================
Builder version: 5.1.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/buzzfeed/MockDuck.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/buzzfeed/MockDuck
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 4729d15 Merge pull request #32 from buzzfeed/feature/update-installation-readme
Cloned https://github.com/buzzfeed/MockDuck.git
Revision (git rev-parse @):
4729d150c199f6920219c1ea969d54dcd0efe943
SUCCESS checkout https://github.com/buzzfeed/MockDuck.git at main
========================================
Build
========================================
Selected platform:         macosXcodebuild
Swift version:             6.4
Building package at path:  $PWD
https://github.com/buzzfeed/MockDuck.git
Command line invocation:
    /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
resolved source packages:
{
  "dependencies" : [
  ],
  "manifest_display_name" : "MockDuck",
  "name" : "MockDuck",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.12"
    },
    {
      "name" : "ios",
      "version" : "10.0"
    },
    {
      "name" : "tvos",
      "version" : "10.0"
    }
  ],
  "products" : [
    {
      "name" : "MockDuck",
      "targets" : [
        "MockDuck"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "MockDuckTests",
      "module_type" : "SwiftTarget",
      "name" : "MockDuckTests",
      "path" : "MockDuckTests/Sources",
      "sources" : [
        "CryptoTests.swift",
        "MockBundleTests.swift",
        "MockDuckTests.swift",
        "MockURLProtocolTests.swift",
        "RequestHandlerTests.swift",
        "RequestHashTests.swift"
      ],
      "target_dependencies" : [
        "MockDuck"
      ],
      "type" : "test"
    },
    {
      "c99name" : "MockDuck",
      "module_type" : "SwiftTarget",
      "name" : "MockDuck",
      "path" : "MockDuck/Sources",
      "product_memberships" : [
        "MockDuck"
      ],
      "sources" : [
        "MockBundle.swift",
        "MockDataTask.swift",
        "MockDuck.swift",
        "MockRequest.swift",
        "MockRequestResponse.swift",
        "MockResponse.swift",
        "MockSession.swift",
        "MockURLProtocol.swift",
        "RequestResponseCommonProtocol.swift",
        "Utilities/CryptoUtils.swift",
        "Utilities/EncodingUtils.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
{
  "project" : {
    "configurations" : [
      "Debug",
      "Release"
    ],
    "name" : "MockDuck",
    "schemes" : [
      "MockDuck"
    ],
    "targets" : [
      "MockDuck",
      "MockDuckTests"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme MockDuck -destination platform=macOS,arch=arm64
Command line invocation:
    /Applications/Xcode-27.0.0-Release.Candidate.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 MockDuck -destination platform=macOS,arch=arm64
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (1 target)
    Target 'MockDuck' in project 'MockDuck' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
ExecuteExternalTool /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -isysroot /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -arch arm64 -isysroot /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc --version
ExecuteExternalTool /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld -version_details
Build description signature: 3cf83acd11f7f9f8ebb4b483a85669ee
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/3cf83acd11f7f9f8ebb4b483a85669ee.xcbuilddata
/Users/admin/builder/spi-builder-workspace/MockDuck.xcodeproj: error: The macOS deployment target 'MACOSX_DEPLOYMENT_TARGET' is set to 10.12, but the range of supported deployment target versions is 12.0 to 27.0.x. (in target 'MockDuck' from project 'MockDuck')
--- xcodebuild: WARNING: Using the first of multiple matching destinations:
{ platform:macOS, arch:arm64, id:ca5f34ad061289565c19c7937b79498570f41cb4, name:My Mac }
{ platform:macOS, arch:arm64, variant:Mac Catalyst, id:ca5f34ad061289565c19c7937b79498570f41cb4, name:My Mac }
{ platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:ca5f34ad061289565c19c7937b79498570f41cb4, name:My Mac }
** BUILD FAILED **
The following build commands failed:
	Building project MockDuck with scheme MockDuck
(1 failure)
Command line invocation:
    /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
resolved source packages:
{
  "dependencies" : [
  ],
  "manifest_display_name" : "MockDuck",
  "name" : "MockDuck",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.12"
    },
    {
      "name" : "ios",
      "version" : "10.0"
    },
    {
      "name" : "tvos",
      "version" : "10.0"
    }
  ],
  "products" : [
    {
      "name" : "MockDuck",
      "targets" : [
        "MockDuck"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "MockDuckTests",
      "module_type" : "SwiftTarget",
      "name" : "MockDuckTests",
      "path" : "MockDuckTests/Sources",
      "sources" : [
        "CryptoTests.swift",
        "MockBundleTests.swift",
        "MockDuckTests.swift",
        "MockURLProtocolTests.swift",
        "RequestHandlerTests.swift",
        "RequestHashTests.swift"
      ],
      "target_dependencies" : [
        "MockDuck"
      ],
      "type" : "test"
    },
    {
      "c99name" : "MockDuck",
      "module_type" : "SwiftTarget",
      "name" : "MockDuck",
      "path" : "MockDuck/Sources",
      "product_memberships" : [
        "MockDuck"
      ],
      "sources" : [
        "MockBundle.swift",
        "MockDataTask.swift",
        "MockDuck.swift",
        "MockRequest.swift",
        "MockRequestResponse.swift",
        "MockResponse.swift",
        "MockSession.swift",
        "MockURLProtocol.swift",
        "RequestResponseCommonProtocol.swift",
        "Utilities/CryptoUtils.swift",
        "Utilities/EncodingUtils.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
{
  "project" : {
    "configurations" : [
      "Debug",
      "Release"
    ],
    "name" : "MockDuck",
    "schemes" : [
      "MockDuck"
    ],
    "targets" : [
      "MockDuck",
      "MockDuckTests"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme MockDuck -destination platform=macOS,arch=arm64
Command line invocation:
    /Applications/Xcode-27.0.0-Release.Candidate.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 MockDuck -destination platform=macOS,arch=arm64
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (1 target)
    Target 'MockDuck' in project 'MockDuck' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
/Users/admin/builder/spi-builder-workspace/MockDuck.xcodeproj: error: The macOS deployment target 'MACOSX_DEPLOYMENT_TARGET' is set to 10.12, but the range of supported deployment target versions is 12.0 to 27.0.x. (in target 'MockDuck' from project 'MockDuck')
--- xcodebuild: WARNING: Using the first of multiple matching destinations:
{ platform:macOS, arch:arm64, id:ca5f34ad061289565c19c7937b79498570f41cb4, name:My Mac }
{ platform:macOS, arch:arm64, variant:Mac Catalyst, id:ca5f34ad061289565c19c7937b79498570f41cb4, name:My Mac }
{ platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:ca5f34ad061289565c19c7937b79498570f41cb4, name:My Mac }
** BUILD FAILED **
The following build commands failed:
	Building project MockDuck with scheme MockDuck
(1 failure)
BUILD FAILURE 6.4 macosXcodebuild