Swift Package Index

Build Information

Failed to build GCDWebServer, reference 4.0.1 (584db8), with Swift 6.4 for macOS (Xcode) using Xcode 27.0 on 21 Sep 2026 15:13:45 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 GCDWebServer (iOS) -destination platform=macOS,arch=arm64

Build Log

========================================
RunAll
========================================
Builder version: 5.1.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/readium/GCDWebServer.git
Reference: 4.0.1
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/readium/GCDWebServer
 * tag               4.0.1      -> FETCH_HEAD
HEAD is now at 584db89 4.0.1 (#13)
Cloned https://github.com/readium/GCDWebServer.git
Revision (git rev-parse @):
584db89a4c3c3be27206cce6afde037b2b6e38d8
SUCCESS checkout https://github.com/readium/GCDWebServer.git at 4.0.1
========================================
Build
========================================
Selected platform:         macosXcodebuild
Swift version:             6.4
Building package at path:  $PWD
https://github.com/readium/GCDWebServer.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" : "GCDWebServer",
  "name" : "GCDWebServer",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "11.0"
    }
  ],
  "products" : [
    {
      "name" : "ReadiumGCDWebServer",
      "targets" : [
        "ReadiumGCDWebServer"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ReadiumGCDWebServer",
      "module_type" : "ClangTarget",
      "name" : "ReadiumGCDWebServer",
      "path" : "GCDWebServer",
      "product_memberships" : [
        "ReadiumGCDWebServer"
      ],
      "sources" : [
        "Core/GCDWebServer.m",
        "Core/GCDWebServerConnection.m",
        "Core/GCDWebServerFunctions.m",
        "Core/GCDWebServerRequest.m",
        "Core/GCDWebServerResponse.m",
        "Requests/GCDWebServerDataRequest.m",
        "Requests/GCDWebServerFileRequest.m",
        "Requests/GCDWebServerMultiPartFormRequest.m",
        "Requests/GCDWebServerURLEncodedFormRequest.m",
        "Responses/GCDWebServerDataResponse.m",
        "Responses/GCDWebServerErrorResponse.m",
        "Responses/GCDWebServerFileResponse.m",
        "Responses/GCDWebServerStreamedResponse.m"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.1"
}
{
  "project" : {
    "configurations" : [
      "Debug",
      "Release"
    ],
    "name" : "GCDWebServer",
    "schemes" : [
      "GCDWebServer (iOS)"
    ],
    "targets" : [
      "GCDWebServer (iOS)"
    ]
  }
}
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 GCDWebServer (iOS) -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 "GCDWebServer (iOS)" -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 'GCDWebServer (iOS)' in project 'GCDWebServer' (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 objective-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/ld -version_details
Build description signature: af25a226e0b98f451a757b0f700dd959
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/af25a226e0b98f451a757b0f700dd959.xcbuilddata
/Users/admin/builder/spi-builder-workspace/GCDWebServer.xcodeproj: error: The macOS deployment target 'MACOSX_DEPLOYMENT_TARGET' is set to 10.15, but the range of supported deployment target versions is 12.0 to 27.0.x. (in target 'GCDWebServer (iOS)' from project 'GCDWebServer')
--- xcodebuild: WARNING: Using the first of multiple matching destinations:
{ platform:macOS, arch:arm64, variant:Mac Catalyst, id:fd63887909942eded657aaab2898c0144f147003, name:My Mac }
{ platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:fd63887909942eded657aaab2898c0144f147003, name:My Mac }
** BUILD FAILED **
The following build commands failed:
	Building project GCDWebServer with scheme GCDWebServer (iOS)
(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" : "GCDWebServer",
  "name" : "GCDWebServer",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "11.0"
    }
  ],
  "products" : [
    {
      "name" : "ReadiumGCDWebServer",
      "targets" : [
        "ReadiumGCDWebServer"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ReadiumGCDWebServer",
      "module_type" : "ClangTarget",
      "name" : "ReadiumGCDWebServer",
      "path" : "GCDWebServer",
      "product_memberships" : [
        "ReadiumGCDWebServer"
      ],
      "sources" : [
        "Core/GCDWebServer.m",
        "Core/GCDWebServerConnection.m",
        "Core/GCDWebServerFunctions.m",
        "Core/GCDWebServerRequest.m",
        "Core/GCDWebServerResponse.m",
        "Requests/GCDWebServerDataRequest.m",
        "Requests/GCDWebServerFileRequest.m",
        "Requests/GCDWebServerMultiPartFormRequest.m",
        "Requests/GCDWebServerURLEncodedFormRequest.m",
        "Responses/GCDWebServerDataResponse.m",
        "Responses/GCDWebServerErrorResponse.m",
        "Responses/GCDWebServerFileResponse.m",
        "Responses/GCDWebServerStreamedResponse.m"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.1"
}
{
  "project" : {
    "configurations" : [
      "Debug",
      "Release"
    ],
    "name" : "GCDWebServer",
    "schemes" : [
      "GCDWebServer (iOS)"
    ],
    "targets" : [
      "GCDWebServer (iOS)"
    ]
  }
}
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 GCDWebServer (iOS) -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 "GCDWebServer (iOS)" -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 'GCDWebServer (iOS)' in project 'GCDWebServer' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
/Users/admin/builder/spi-builder-workspace/GCDWebServer.xcodeproj: error: The macOS deployment target 'MACOSX_DEPLOYMENT_TARGET' is set to 10.15, but the range of supported deployment target versions is 12.0 to 27.0.x. (in target 'GCDWebServer (iOS)' from project 'GCDWebServer')
--- xcodebuild: WARNING: Using the first of multiple matching destinations:
{ platform:macOS, arch:arm64, variant:Mac Catalyst, id:fd63887909942eded657aaab2898c0144f147003, name:My Mac }
{ platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:fd63887909942eded657aaab2898c0144f147003, name:My Mac }
** BUILD FAILED **
The following build commands failed:
	Building project GCDWebServer with scheme GCDWebServer (iOS)
(1 failure)
BUILD FAILURE 6.4 macosXcodebuild