Swift Package Index

Build Information

Failed to build slash, reference master (01e55c), with Swift 6.4 for macOS (Xcode) using Xcode 27.0 on 16 Sep 2026 10:32:15 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 slash -destination platform=macOS,arch=arm64

Build Log

========================================
RunAll
========================================
Builder version: 5.1.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/slash-hq/slash.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/slash-hq/slash
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 01e55ce Add support for message reactions.
Cloned https://github.com/slash-hq/slash.git
Revision (git rev-parse @):
01e55ce89b9015c98bae32ba1371ef7a48a3c0f0
SUCCESS checkout https://github.com/slash-hq/slash.git at master
========================================
Build
========================================
Selected platform:         macosXcodebuild
Swift version:             6.4
Building package at path:  $PWD
https://github.com/slash-hq/slash.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" : "slash",
  "name" : "slash",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "slash",
      "targets" : [
        "slash"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "slash",
      "module_type" : "SwiftTarget",
      "name" : "slash",
      "path" : "Sources",
      "product_memberships" : [
        "slash"
      ],
      "sources" : [
        "Application.swift",
        "ChannelsListView.swift",
        "CrashReporter.swift",
        "MessagesListView.swift",
        "R.swift",
        "Server.swift",
        "SlackAdapter.swift",
        "SlackChannel.swift",
        "SlackContext.swift",
        "SlackEmojiDecoder.swift",
        "SlackEvent.swift",
        "SlackGroup.swift",
        "SlackIM.swift",
        "SlackMessage.swift",
        "SlackMessageReaction.swift",
        "SlackOAuth2.swift",
        "SlackRealTimeClient.swift",
        "SlackTeam.swift",
        "SlackUser.swift",
        "SlackWebClient.swift",
        "Socket.swift",
        "TLSSocket.swift",
        "TerminalCanvas.swift",
        "TerminalDevice.swift",
        "TextLayout.swift",
        "URLSession.swift",
        "UserInputView.swift",
        "Utils.swift",
        "WebSocketClient.swift",
        "main.swift"
      ],
      "type" : "executable"
    }
  ],
  "tools_version" : "4.2"
}
{
  "project" : {
    "configurations" : [
      "Debug",
      "Release"
    ],
    "name" : "slash",
    "schemes" : [
      "slash"
    ],
    "targets" : [
      "slash"
    ]
  }
}
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 slash -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 slash -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 'slash' in project 'slash' (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/swiftc --version
ExecuteExternalTool /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld -version_details
Build description signature: 8c623721e02565f51613721849e53b21
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/8c623721e02565f51613721849e53b21.xcbuilddata
/Users/admin/builder/spi-builder-workspace/slash.xcodeproj: error: The macOS deployment target 'MACOSX_DEPLOYMENT_TARGET' is set to 10.11, but the range of supported deployment target versions is 12.0 to 27.0.x. (in target 'slash' from project 'slash')
** BUILD FAILED **
The following build commands failed:
	Building project slash with scheme slash
(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" : "slash",
  "name" : "slash",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "slash",
      "targets" : [
        "slash"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "slash",
      "module_type" : "SwiftTarget",
      "name" : "slash",
      "path" : "Sources",
      "product_memberships" : [
        "slash"
      ],
      "sources" : [
        "Application.swift",
        "ChannelsListView.swift",
        "CrashReporter.swift",
        "MessagesListView.swift",
        "R.swift",
        "Server.swift",
        "SlackAdapter.swift",
        "SlackChannel.swift",
        "SlackContext.swift",
        "SlackEmojiDecoder.swift",
        "SlackEvent.swift",
        "SlackGroup.swift",
        "SlackIM.swift",
        "SlackMessage.swift",
        "SlackMessageReaction.swift",
        "SlackOAuth2.swift",
        "SlackRealTimeClient.swift",
        "SlackTeam.swift",
        "SlackUser.swift",
        "SlackWebClient.swift",
        "Socket.swift",
        "TLSSocket.swift",
        "TerminalCanvas.swift",
        "TerminalDevice.swift",
        "TextLayout.swift",
        "URLSession.swift",
        "UserInputView.swift",
        "Utils.swift",
        "WebSocketClient.swift",
        "main.swift"
      ],
      "type" : "executable"
    }
  ],
  "tools_version" : "4.2"
}
{
  "project" : {
    "configurations" : [
      "Debug",
      "Release"
    ],
    "name" : "slash",
    "schemes" : [
      "slash"
    ],
    "targets" : [
      "slash"
    ]
  }
}
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 slash -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 slash -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 'slash' in project 'slash' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
/Users/admin/builder/spi-builder-workspace/slash.xcodeproj: error: The macOS deployment target 'MACOSX_DEPLOYMENT_TARGET' is set to 10.11, but the range of supported deployment target versions is 12.0 to 27.0.x. (in target 'slash' from project 'slash')
** BUILD FAILED **
The following build commands failed:
	Building project slash with scheme slash
(1 failure)
BUILD FAILURE 6.4 macosXcodebuild