Swift Package Index

Build Information

Failed to build RomanNumeralKit, reference 1.2.1 (738d9e), with Swift 6.4 for macOS (Xcode) using Xcode 27.0 on 17 Sep 2026 18:30:34 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 RomanNumeralKit -destination platform=macOS,arch=arm64

Build Log

========================================
RunAll
========================================
Builder version: 5.1.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/kylehughes/RomanNumeralKit.git
Reference: 1.2.1
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/kylehughes/RomanNumeralKit
 * tag               1.2.1      -> FETCH_HEAD
HEAD is now at 738d9ea Bump version to 1.2.1
Cloned https://github.com/kylehughes/RomanNumeralKit.git
Revision (git rev-parse @):
738d9ea027823f0ed592a10e4c6ecbf08636f76f
SUCCESS checkout https://github.com/kylehughes/RomanNumeralKit.git at 1.2.1
========================================
Build
========================================
Selected platform:         macosXcodebuild
Swift version:             6.4
Building package at path:  $PWD
https://github.com/kylehughes/RomanNumeralKit.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" : "RomanNumeralKit",
  "name" : "RomanNumeralKit",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.12"
    },
    {
      "name" : "ios",
      "version" : "10.0"
    },
    {
      "name" : "tvos",
      "version" : "10.0"
    },
    {
      "name" : "watchos",
      "version" : "3.0"
    }
  ],
  "products" : [
    {
      "name" : "RomanNumeralKit",
      "targets" : [
        "RomanNumeralKit"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "5"
  ],
  "targets" : [
    {
      "c99name" : "RomanNumeralKitTests",
      "module_type" : "SwiftTarget",
      "name" : "RomanNumeralKitTests",
      "path" : "Tests/RomanNumeralKitTests",
      "sources" : [
        "Extensions/Foundation/CalendarTests+RomanNumeral.swift",
        "Extensions/Foundation/DateComponentsTests+RomanNumeral.swift",
        "Extensions/Foundation/IntTests+RomanNumeral.swift",
        "Extensions/Foundation/StringTests+RomanNumeral.swift",
        "Numeric System/Additive Notation/AdditiveRomanNumeralTests.swift",
        "Numeric System/RomanNumeralArithmeticErrorTests.swift",
        "Numeric System/RomanNumeralErrorTests.swift",
        "Numeric System/RomanNumeralSymbolErrorTests.swift",
        "Numeric System/RomanNumeralSymbolTests.swift",
        "Numeric System/RomanNumeralTallyMarkGroupTests.swift",
        "Numeric System/Subtractive Notation/RomanNumeralTests.swift",
        "Numeric System/Subtractive Notation/SubtractiveRomanNumeralSymbolTests.swift"
      ],
      "target_dependencies" : [
        "RomanNumeralKit"
      ],
      "type" : "test"
    },
    {
      "c99name" : "RomanNumeralKit",
      "module_type" : "SwiftTarget",
      "name" : "RomanNumeralKit",
      "path" : "Sources/RomanNumeralKit",
      "product_memberships" : [
        "RomanNumeralKit"
      ],
      "sources" : [
        "Extensions/Foundation/Calendar+RomanNumeral.swift",
        "Extensions/Foundation/DateComponents+RomanNumeral.swift",
        "Extensions/Foundation/Int+RomanNumeral.swift",
        "Extensions/Foundation/Sequence+Sorting.swift",
        "Extensions/Foundation/String+RomanNumeral.swift",
        "Numeric System/Additive Notation/AdditiveRomanNumeral.swift",
        "Numeric System/Additive Notation/AdditiveRomanNumeralConvertible.swift",
        "Numeric System/Additive Notation/AdditiveRomanNumeralSymbolCondenser.swift",
        "Numeric System/Additive Notation/AdditiveRomanNumeralSymbolConvertible.swift",
        "Numeric System/Additive Notation/AdditiveRomanNumeralSymbolsConvertible.swift",
        "Numeric System/RomanNumeralArithmeticError.swift",
        "Numeric System/RomanNumeralError.swift",
        "Numeric System/RomanNumeralProtocol.swift",
        "Numeric System/RomanNumeralSymbol.swift",
        "Numeric System/RomanNumeralSymbolConvertible.swift",
        "Numeric System/RomanNumeralSymbolError.swift",
        "Numeric System/RomanNumeralSymbolProtocol.swift",
        "Numeric System/RomanNumeralSymbolsConvertible.swift",
        "Numeric System/RomanNumeralTallyMark.swift",
        "Numeric System/RomanNumeralTallyMarkGroup.swift",
        "Numeric System/RomanNumerals.swift",
        "Numeric System/Subtractive Notation/RomanNumeral.swift",
        "Numeric System/Subtractive Notation/RomanNumeralConvertible.swift",
        "Numeric System/Subtractive Notation/SubtractiveRomanNumeralSymbol.swift",
        "Numeric System/Subtractive Notation/SubtractiveRomanNumeralSymbolConvertible.swift",
        "Numeric System/Subtractive Notation/SubtractiveRomanNumeralSymbolsConvertible.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.3"
}
{
  "project" : {
    "configurations" : [
      "Debug",
      "Release"
    ],
    "name" : "RomanNumeralKit",
    "schemes" : [
      "RomanNumeralKit"
    ],
    "targets" : [
      "RomanNumeralKit",
      "RomanNumeralKitTests"
    ]
  }
}
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 RomanNumeralKit -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 RomanNumeralKit -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 'RomanNumeralKit' in project 'RomanNumeralKit' (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: 1cf1d222a6747d841b8f62cdecdd9192
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/1cf1d222a6747d841b8f62cdecdd9192.xcbuilddata
/Users/admin/builder/spi-builder-workspace/RomanNumeralKit.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 'RomanNumeralKit' from project 'RomanNumeralKit')
--- xcodebuild: WARNING: Using the first of multiple matching destinations:
{ platform:macOS, arch:arm64, id:4a424ae96a8505458ede45ab7170250e37c5f842, name:My Mac }
{ platform:macOS, arch:arm64, variant:Mac Catalyst, id:4a424ae96a8505458ede45ab7170250e37c5f842, name:My Mac }
{ platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:4a424ae96a8505458ede45ab7170250e37c5f842, name:My Mac }
** BUILD FAILED **
The following build commands failed:
	Building project RomanNumeralKit with scheme RomanNumeralKit
(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" : "RomanNumeralKit",
  "name" : "RomanNumeralKit",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.12"
    },
    {
      "name" : "ios",
      "version" : "10.0"
    },
    {
      "name" : "tvos",
      "version" : "10.0"
    },
    {
      "name" : "watchos",
      "version" : "3.0"
    }
  ],
  "products" : [
    {
      "name" : "RomanNumeralKit",
      "targets" : [
        "RomanNumeralKit"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "5"
  ],
  "targets" : [
    {
      "c99name" : "RomanNumeralKitTests",
      "module_type" : "SwiftTarget",
      "name" : "RomanNumeralKitTests",
      "path" : "Tests/RomanNumeralKitTests",
      "sources" : [
        "Extensions/Foundation/CalendarTests+RomanNumeral.swift",
        "Extensions/Foundation/DateComponentsTests+RomanNumeral.swift",
        "Extensions/Foundation/IntTests+RomanNumeral.swift",
        "Extensions/Foundation/StringTests+RomanNumeral.swift",
        "Numeric System/Additive Notation/AdditiveRomanNumeralTests.swift",
        "Numeric System/RomanNumeralArithmeticErrorTests.swift",
        "Numeric System/RomanNumeralErrorTests.swift",
        "Numeric System/RomanNumeralSymbolErrorTests.swift",
        "Numeric System/RomanNumeralSymbolTests.swift",
        "Numeric System/RomanNumeralTallyMarkGroupTests.swift",
        "Numeric System/Subtractive Notation/RomanNumeralTests.swift",
        "Numeric System/Subtractive Notation/SubtractiveRomanNumeralSymbolTests.swift"
      ],
      "target_dependencies" : [
        "RomanNumeralKit"
      ],
      "type" : "test"
    },
    {
      "c99name" : "RomanNumeralKit",
      "module_type" : "SwiftTarget",
      "name" : "RomanNumeralKit",
      "path" : "Sources/RomanNumeralKit",
      "product_memberships" : [
        "RomanNumeralKit"
      ],
      "sources" : [
        "Extensions/Foundation/Calendar+RomanNumeral.swift",
        "Extensions/Foundation/DateComponents+RomanNumeral.swift",
        "Extensions/Foundation/Int+RomanNumeral.swift",
        "Extensions/Foundation/Sequence+Sorting.swift",
        "Extensions/Foundation/String+RomanNumeral.swift",
        "Numeric System/Additive Notation/AdditiveRomanNumeral.swift",
        "Numeric System/Additive Notation/AdditiveRomanNumeralConvertible.swift",
        "Numeric System/Additive Notation/AdditiveRomanNumeralSymbolCondenser.swift",
        "Numeric System/Additive Notation/AdditiveRomanNumeralSymbolConvertible.swift",
        "Numeric System/Additive Notation/AdditiveRomanNumeralSymbolsConvertible.swift",
        "Numeric System/RomanNumeralArithmeticError.swift",
        "Numeric System/RomanNumeralError.swift",
        "Numeric System/RomanNumeralProtocol.swift",
        "Numeric System/RomanNumeralSymbol.swift",
        "Numeric System/RomanNumeralSymbolConvertible.swift",
        "Numeric System/RomanNumeralSymbolError.swift",
        "Numeric System/RomanNumeralSymbolProtocol.swift",
        "Numeric System/RomanNumeralSymbolsConvertible.swift",
        "Numeric System/RomanNumeralTallyMark.swift",
        "Numeric System/RomanNumeralTallyMarkGroup.swift",
        "Numeric System/RomanNumerals.swift",
        "Numeric System/Subtractive Notation/RomanNumeral.swift",
        "Numeric System/Subtractive Notation/RomanNumeralConvertible.swift",
        "Numeric System/Subtractive Notation/SubtractiveRomanNumeralSymbol.swift",
        "Numeric System/Subtractive Notation/SubtractiveRomanNumeralSymbolConvertible.swift",
        "Numeric System/Subtractive Notation/SubtractiveRomanNumeralSymbolsConvertible.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.3"
}
{
  "project" : {
    "configurations" : [
      "Debug",
      "Release"
    ],
    "name" : "RomanNumeralKit",
    "schemes" : [
      "RomanNumeralKit"
    ],
    "targets" : [
      "RomanNumeralKit",
      "RomanNumeralKitTests"
    ]
  }
}
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 RomanNumeralKit -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 RomanNumeralKit -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 'RomanNumeralKit' in project 'RomanNumeralKit' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
/Users/admin/builder/spi-builder-workspace/RomanNumeralKit.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 'RomanNumeralKit' from project 'RomanNumeralKit')
--- xcodebuild: WARNING: Using the first of multiple matching destinations:
{ platform:macOS, arch:arm64, id:4a424ae96a8505458ede45ab7170250e37c5f842, name:My Mac }
{ platform:macOS, arch:arm64, variant:Mac Catalyst, id:4a424ae96a8505458ede45ab7170250e37c5f842, name:My Mac }
{ platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:4a424ae96a8505458ede45ab7170250e37c5f842, name:My Mac }
** BUILD FAILED **
The following build commands failed:
	Building project RomanNumeralKit with scheme RomanNumeralKit
(1 failure)
BUILD FAILURE 6.4 macosXcodebuild