Swift Package Index

Build Information

Failed to build Mobius, reference 0.7.0 (2ce2f0), with Swift 6.2 for watchOS using Xcode 26.3 on 21 Aug 2025 20:26:35 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-26.0.0-Beta.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme Mobius-Package -destination generic/platform=watchOS

Build Log

========================================
RunAll
========================================
Builder version: 4.67.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/spotify/Mobius.swift.git
Reference: 0.7.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/spotify/Mobius.swift
 * tag               0.7.0      -> FETCH_HEAD
HEAD is now at 2ce2f06 Merge pull request #216 from spotify/tools-version
Cloned https://github.com/spotify/Mobius.swift.git
Revision (git rev-parse @):
2ce2f0641cb19194405d553ca8b54196f01d8969
SUCCESS checkout https://github.com/spotify/Mobius.swift.git at 0.7.0
========================================
Build
========================================
Selected platform:         watchOS
Swift version:             6.2
Building package at path:  $PWD
https://github.com/spotify/Mobius.swift.git
Command line invocation:
    /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Fetching from https://github.com/Quick/Quick
Fetching from https://github.com/Quick/Nimble
Fetching from https://github.com/pointfreeco/swift-case-paths
Fetching from https://github.com/mattgallagher/CwlPreconditionTesting.git
Fetching from https://github.com/mattgallagher/CwlCatchException.git
Fetching from https://github.com/apple/swift-argument-parser.git
Fetching from https://github.com/apple/swift-algorithms.git
Fetching from https://github.com/apple/swift-numerics.git
Creating working copy of package ‘swift-argument-parser’
Checking out 1.6.1 of package ‘swift-argument-parser’
Creating working copy of package ‘swift-numerics’
Checking out 1.0.3 of package ‘swift-numerics’
Creating working copy of package ‘CwlCatchException’
Checking out 2.2.1 of package ‘CwlCatchException’
Creating working copy of package ‘Quick’
Checking out 7.6.2 of package ‘Quick’
Creating working copy of package ‘CwlPreconditionTesting’
Checking out 2.2.2 of package ‘CwlPreconditionTesting’
Creating working copy of package ‘swift-algorithms’
Checking out 1.2.1 of package ‘swift-algorithms’
Creating working copy of package ‘Nimble’
Checking out 10.0.0 of package ‘Nimble’
Creating working copy of package ‘swift-case-paths’
Checking out 0.10.1 of package ‘swift-case-paths’
Resolve Package Graph
Resolved source packages:
  swift-algorithms: https://github.com/apple/swift-algorithms.git @ 1.2.1
  Mobius: /Users/admin/builder/spi-builder-workspace
  Quick: https://github.com/Quick/Quick @ 7.6.2
  swift-case-paths: https://github.com/pointfreeco/swift-case-paths @ 0.10.1
  CwlCatchException: https://github.com/mattgallagher/CwlCatchException.git @ 2.2.1
  swift-numerics: https://github.com/apple/swift-numerics.git @ 1.0.3
  Nimble: https://github.com/Quick/Nimble @ 10.0.0
  CwlPreconditionTesting: https://github.com/mattgallagher/CwlPreconditionTesting.git @ 2.2.2
  swift-argument-parser: https://github.com/apple/swift-argument-parser.git @ 1.6.1
resolved source packages: swift-algorithms, Mobius, Quick, swift-case-paths, CwlCatchException, swift-numerics, Nimble, CwlPreconditionTesting, swift-argument-parser
{
  "dependencies" : [
    {
      "identity" : "swift-case-paths",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "0.10.1",
            "upper_bound" : "0.11.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/pointfreeco/swift-case-paths"
    },
    {
      "identity" : "nimble",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "10.0.0",
            "upper_bound" : "11.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/Quick/Nimble"
    },
    {
      "identity" : "quick",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "7.0.0",
            "upper_bound" : "8.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/Quick/Quick"
    }
  ],
  "manifest_display_name" : "Mobius",
  "name" : "Mobius",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "10.0"
    },
    {
      "name" : "macos",
      "version" : "10.12"
    },
    {
      "name" : "tvos",
      "version" : "10.0"
    },
    {
      "name" : "watchos",
      "version" : "3.0"
    }
  ],
  "products" : [
    {
      "name" : "MobiusCore",
      "targets" : [
        "MobiusCore"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "MobiusExtras",
      "targets" : [
        "MobiusExtras"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "MobiusNimble",
      "targets" : [
        "MobiusNimble"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "MobiusTest",
      "targets" : [
        "MobiusTest"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "5"
  ],
  "targets" : [
    {
      "c99name" : "MobiusThrowableAssertion",
      "module_type" : "ClangTarget",
      "name" : "MobiusThrowableAssertion",
      "path" : "MobiusThrowableAssertion/Source",
      "sources" : [
        "MobiusThrowableAssertion.m"
      ],
      "type" : "library"
    },
    {
      "c99name" : "MobiusTestTests",
      "module_type" : "SwiftTarget",
      "name" : "MobiusTestTests",
      "path" : "MobiusTest/Test",
      "product_dependencies" : [
        "Nimble",
        "Quick"
      ],
      "sources" : [
        "DebugDiffTests.swift",
        "FirstMatchersTests.swift",
        "InitSpecTests.swift",
        "NextMatchersTests.swift",
        "TestUtil.swift",
        "UpdateSpecTests.swift"
      ],
      "target_dependencies" : [
        "MobiusTest"
      ],
      "type" : "test"
    },
    {
      "c99name" : "MobiusTest",
      "module_type" : "SwiftTarget",
      "name" : "MobiusTest",
      "path" : "MobiusTest/Source",
      "product_memberships" : [
        "MobiusNimble",
        "MobiusTest"
      ],
      "sources" : [
        "DebugDiff.swift",
        "FirstMatchers.swift",
        "InitSpec.swift",
        "MatcherUtils.swift",
        "NextMatchers.swift",
        "SimpleDiff.swift",
        "UpdateSpec.swift"
      ],
      "target_dependencies" : [
        "MobiusCore"
      ],
      "type" : "library"
    },
    {
      "c99name" : "MobiusNimbleTests",
      "module_type" : "SwiftTarget",
      "name" : "MobiusNimbleTests",
      "path" : "MobiusNimble/Test",
      "product_dependencies" : [
        "Quick"
      ],
      "sources" : [
        "NimbleFirstMatchersTests.swift",
        "NimbleNextMatchersTests.swift",
        "TestUtil.swift"
      ],
      "target_dependencies" : [
        "MobiusNimble"
      ],
      "type" : "test"
    },
    {
      "c99name" : "MobiusNimble",
      "module_type" : "SwiftTarget",
      "name" : "MobiusNimble",
      "path" : "MobiusNimble/Source",
      "product_dependencies" : [
        "Nimble"
      ],
      "product_memberships" : [
        "MobiusNimble"
      ],
      "sources" : [
        "NimbleFirstMatchers.swift",
        "NimbleNextMatchers.swift"
      ],
      "target_dependencies" : [
        "MobiusCore",
        "MobiusTest"
      ],
      "type" : "library"
    },
    {
      "c99name" : "MobiusExtrasTests",
      "module_type" : "SwiftTarget",
      "name" : "MobiusExtrasTests",
      "path" : "MobiusExtras/Test",
      "product_dependencies" : [
        "Nimble",
        "Quick"
      ],
      "sources" : [
        "ConnectableClassTests.swift",
        "ConnectableContramapTests.swift",
        "ConnectableMapTests.swift",
        "CopyableTests.swift",
        "EventSource+ExtensionsTests.swift",
        "WikiTutorialTest.swift"
      ],
      "target_dependencies" : [
        "MobiusCore",
        "MobiusExtras",
        "MobiusThrowableAssertion"
      ],
      "type" : "test"
    },
    {
      "c99name" : "MobiusExtras",
      "module_type" : "SwiftTarget",
      "name" : "MobiusExtras",
      "path" : "MobiusExtras/Source",
      "product_memberships" : [
        "MobiusExtras"
      ],
      "sources" : [
        "BeginnerLoop.swift",
        "ConnectableClass.swift",
        "ConnectableContramap.swift",
        "ConnectableMap.swift",
        "Copyable.swift",
        "EventSourceMap.swift",
        "SimpleLogger.swift"
      ],
      "target_dependencies" : [
        "MobiusCore"
      ],
      "type" : "library"
    },
    {
      "c99name" : "MobiusCoreTests",
      "module_type" : "SwiftTarget",
      "name" : "MobiusCoreTests",
      "path" : "MobiusCore/Test",
      "product_dependencies" : [
        "Nimble",
        "Quick"
      ],
      "sources" : [
        "AnonymousDisposableTests.swift",
        "AnyConnectionTests.swift",
        "AnyMobiusLoggerTests.swift",
        "AsyncDispatchQueueConnectableTests.swift",
        "CompositeDisposableTests.swift",
        "ConnectablePublisherTests.swift",
        "EffectHandlers/AnyEffectHandlerTests.swift",
        "EffectHandlers/CallbackTests.swift",
        "EffectHandlers/EffectHandlerTests.swift",
        "EffectHandlers/EffectRouterDSLTests.swift",
        "EffectHandlers/EffectRouterTests.swift",
        "EffectHandlers/EnumRouteTests.swift",
        "EventRouterDisposalLogicalRaceRegressionTest.swift",
        "EventSources/AnyEventSourceTests.swift",
        "EventSources/CompositeEventSourceBuilderTests.swift",
        "FirstTests.swift",
        "InitializationTests.swift",
        "LoggingInitiateTests.swift",
        "LoggingUpdateTests.swift",
        "MobiusControllerTests.swift",
        "MobiusHooksTests.swift",
        "MobiusIntegrationTests.swift",
        "MobiusLoopTests.swift",
        "NextTests.swift",
        "NonReentrancyTests.swift",
        "Task+DisposableTests.swift",
        "TestingErrorHandler.swift",
        "TestingUtil.swift",
        "WorkBagTests.swift"
      ],
      "target_dependencies" : [
        "MobiusCore",
        "MobiusThrowableAssertion"
      ],
      "type" : "test"
    },
    {
      "c99name" : "MobiusCore",
      "module_type" : "SwiftTarget",
      "name" : "MobiusCore",
      "path" : "MobiusCore/Source",
      "product_dependencies" : [
        "CasePaths"
      ],
      "product_memberships" : [
        "MobiusCore",
        "MobiusExtras",
        "MobiusNimble",
        "MobiusTest"
      ],
      "sources" : [
        "AsyncDispatchQueueConnectable.swift",
        "AsyncStartStopStateMachine.swift",
        "ConcurrentAccessDetector.swift",
        "Connectable.swift",
        "ConnectablePublisher.swift",
        "Connection.swift",
        "Consumer.swift",
        "Disposables/AnonymousDisposable.swift",
        "Disposables/CompositeDisposable.swift",
        "Disposables/Disposable.swift",
        "Disposables/Task+Disposable.swift",
        "EffectHandlers/EffectCallback.swift",
        "EffectHandlers/EffectExecutor.swift",
        "EffectHandlers/EffectHandler.swift",
        "EffectHandlers/EffectRouter.swift",
        "EffectHandlers/EffectRouterDSL.swift",
        "EffectHandlers/EnumRoute.swift",
        "EffectHandlers/ThreadSafeConnectable.swift",
        "EventSources/AnyEventSource.swift",
        "EventSources/CompositeEventSourceBuilder.swift",
        "EventSources/EventSource.swift",
        "First.swift",
        "Lock.swift",
        "LoggingAdaptors.swift",
        "Mobius.swift",
        "MobiusController.swift",
        "MobiusHooks.swift",
        "MobiusLogger.swift",
        "MobiusLoop.swift",
        "Next.swift",
        "WorkBag.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.2"
}
{
  "workspace" : {
    "name" : "spi-builder-workspace",
    "schemes" : [
      "Mobius-Package",
      "MobiusCore",
      "MobiusExtras",
      "MobiusNimble",
      "MobiusTest"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-26.0.0-Beta.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme Mobius-Package -destination generic/platform=watchOS
Command line invocation:
    /Applications/Xcode-26.0.0-Beta.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 Mobius-Package -destination generic/platform=watchOS
Resolve Package Graph
Resolve Package Graph
Resolved source packages:
  Nimble: https://github.com/Quick/Nimble @ 10.0.0
  Mobius: /Users/admin/builder/spi-builder-workspace
  swift-argument-parser: https://github.com/apple/swift-argument-parser.git @ 1.6.1
  swift-case-paths: https://github.com/pointfreeco/swift-case-paths @ 0.10.1
  swift-numerics: https://github.com/apple/swift-numerics.git @ 1.0.3
  swift-algorithms: https://github.com/apple/swift-algorithms.git @ 1.2.1
  CwlCatchException: https://github.com/mattgallagher/CwlCatchException.git @ 2.2.1
  Quick: https://github.com/Quick/Quick @ 7.6.2
  CwlPreconditionTesting: https://github.com/mattgallagher/CwlPreconditionTesting.git @ 2.2.2
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (12 targets)
    Target 'MobiusTest' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusTest' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusCore' in project 'Mobius'
        ➜ Explicit dependency on target 'CasePaths' in project 'swift-case-paths'
    Target 'MobiusNimble' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusNimble' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusCore' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusTest' in project 'Mobius'
        ➜ Explicit dependency on target 'CasePaths' in project 'swift-case-paths'
        ➜ Explicit dependency on target 'Nimble' in project 'Nimble'
    Target 'MobiusNimble' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusCore' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusTest' in project 'Mobius'
        ➜ Explicit dependency on target 'CasePaths' in project 'swift-case-paths'
        ➜ Explicit dependency on target 'Nimble' in project 'Nimble'
    Target 'Nimble' in project 'Nimble'
        ➜ Explicit dependency on target 'Nimble' in project 'Nimble'
    Target 'Nimble' in project 'Nimble' (no dependencies)
    Target 'MobiusTest' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusCore' in project 'Mobius'
        ➜ Explicit dependency on target 'CasePaths' in project 'swift-case-paths'
    Target 'MobiusExtras' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusExtras' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusCore' in project 'Mobius'
        ➜ Explicit dependency on target 'CasePaths' in project 'swift-case-paths'
    Target 'MobiusExtras' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusCore' in project 'Mobius'
        ➜ Explicit dependency on target 'CasePaths' in project 'swift-case-paths'
    Target 'MobiusCore' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusCore' in project 'Mobius'
        ➜ Explicit dependency on target 'CasePaths' in project 'swift-case-paths'
    Target 'MobiusCore' in project 'Mobius'
        ➜ Explicit dependency on target 'CasePaths' in project 'swift-case-paths'
    Target 'CasePaths' in project 'swift-case-paths'
        ➜ Explicit dependency on target 'CasePaths' in project 'swift-case-paths'
    Target 'CasePaths' in project 'swift-case-paths' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
ExecuteExternalTool /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc --version
ExecuteExternalTool /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -isysroot /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.0.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld -version_details
Build description signature: 34392a32b7255195c0e5bc545e68b74b
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/34392a32b7255195c0e5bc545e68b74b.xcbuilddata
error: The package product 'CasePaths' requires minimum platform version 5.0 for the watchOS platform, but this target supports 4.0 (in target 'MobiusCore' from project 'Mobius')
error: The package product 'CasePaths' requires minimum platform version 5.0 for the watchOS platform, but this target supports 4.0 (in target 'MobiusTest' from project 'Mobius')
error: The package product 'CasePaths' requires minimum platform version 5.0 for the watchOS platform, but this target supports 4.0 (in target 'MobiusExtras' from project 'Mobius')
error: The package product 'CasePaths' requires minimum platform version 5.0 for the watchOS platform, but this target supports 4.0 (in target 'MobiusNimble' from project 'Mobius')
error: The package product 'Nimble' requires minimum platform version 5.0 for the watchOS platform, but this target supports 4.0 (in target 'MobiusNimble' from project 'Mobius')
** BUILD FAILED **
The following build commands failed:
	Building workspace spi-builder-workspace with scheme Mobius-Package
(1 failure)
Command line invocation:
    /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Resolved source packages:
  swift-argument-parser: https://github.com/apple/swift-argument-parser.git @ 1.6.1
  CwlCatchException: https://github.com/mattgallagher/CwlCatchException.git @ 2.2.1
  Nimble: https://github.com/Quick/Nimble @ 10.0.0
  CwlPreconditionTesting: https://github.com/mattgallagher/CwlPreconditionTesting.git @ 2.2.2
  swift-case-paths: https://github.com/pointfreeco/swift-case-paths @ 0.10.1
  swift-algorithms: https://github.com/apple/swift-algorithms.git @ 1.2.1
  Mobius: /Users/admin/builder/spi-builder-workspace
  Quick: https://github.com/Quick/Quick @ 7.6.2
  swift-numerics: https://github.com/apple/swift-numerics.git @ 1.0.3
resolved source packages: swift-argument-parser, CwlCatchException, Nimble, CwlPreconditionTesting, swift-case-paths, swift-algorithms, Mobius, Quick, swift-numerics
{
  "dependencies" : [
    {
      "identity" : "swift-case-paths",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "0.10.1",
            "upper_bound" : "0.11.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/pointfreeco/swift-case-paths"
    },
    {
      "identity" : "nimble",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "10.0.0",
            "upper_bound" : "11.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/Quick/Nimble"
    },
    {
      "identity" : "quick",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "7.0.0",
            "upper_bound" : "8.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/Quick/Quick"
    }
  ],
  "manifest_display_name" : "Mobius",
  "name" : "Mobius",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "10.0"
    },
    {
      "name" : "macos",
      "version" : "10.12"
    },
    {
      "name" : "tvos",
      "version" : "10.0"
    },
    {
      "name" : "watchos",
      "version" : "3.0"
    }
  ],
  "products" : [
    {
      "name" : "MobiusCore",
      "targets" : [
        "MobiusCore"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "MobiusExtras",
      "targets" : [
        "MobiusExtras"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "MobiusNimble",
      "targets" : [
        "MobiusNimble"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "MobiusTest",
      "targets" : [
        "MobiusTest"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "5"
  ],
  "targets" : [
    {
      "c99name" : "MobiusThrowableAssertion",
      "module_type" : "ClangTarget",
      "name" : "MobiusThrowableAssertion",
      "path" : "MobiusThrowableAssertion/Source",
      "sources" : [
        "MobiusThrowableAssertion.m"
      ],
      "type" : "library"
    },
    {
      "c99name" : "MobiusTestTests",
      "module_type" : "SwiftTarget",
      "name" : "MobiusTestTests",
      "path" : "MobiusTest/Test",
      "product_dependencies" : [
        "Nimble",
        "Quick"
      ],
      "sources" : [
        "DebugDiffTests.swift",
        "FirstMatchersTests.swift",
        "InitSpecTests.swift",
        "NextMatchersTests.swift",
        "TestUtil.swift",
        "UpdateSpecTests.swift"
      ],
      "target_dependencies" : [
        "MobiusTest"
      ],
      "type" : "test"
    },
    {
      "c99name" : "MobiusTest",
      "module_type" : "SwiftTarget",
      "name" : "MobiusTest",
      "path" : "MobiusTest/Source",
      "product_memberships" : [
        "MobiusNimble",
        "MobiusTest"
      ],
      "sources" : [
        "DebugDiff.swift",
        "FirstMatchers.swift",
        "InitSpec.swift",
        "MatcherUtils.swift",
        "NextMatchers.swift",
        "SimpleDiff.swift",
        "UpdateSpec.swift"
      ],
      "target_dependencies" : [
        "MobiusCore"
      ],
      "type" : "library"
    },
    {
      "c99name" : "MobiusNimbleTests",
      "module_type" : "SwiftTarget",
      "name" : "MobiusNimbleTests",
      "path" : "MobiusNimble/Test",
      "product_dependencies" : [
        "Quick"
      ],
      "sources" : [
        "NimbleFirstMatchersTests.swift",
        "NimbleNextMatchersTests.swift",
        "TestUtil.swift"
      ],
      "target_dependencies" : [
        "MobiusNimble"
      ],
      "type" : "test"
    },
    {
      "c99name" : "MobiusNimble",
      "module_type" : "SwiftTarget",
      "name" : "MobiusNimble",
      "path" : "MobiusNimble/Source",
      "product_dependencies" : [
        "Nimble"
      ],
      "product_memberships" : [
        "MobiusNimble"
      ],
      "sources" : [
        "NimbleFirstMatchers.swift",
        "NimbleNextMatchers.swift"
      ],
      "target_dependencies" : [
        "MobiusCore",
        "MobiusTest"
      ],
      "type" : "library"
    },
    {
      "c99name" : "MobiusExtrasTests",
      "module_type" : "SwiftTarget",
      "name" : "MobiusExtrasTests",
      "path" : "MobiusExtras/Test",
      "product_dependencies" : [
        "Nimble",
        "Quick"
      ],
      "sources" : [
        "ConnectableClassTests.swift",
        "ConnectableContramapTests.swift",
        "ConnectableMapTests.swift",
        "CopyableTests.swift",
        "EventSource+ExtensionsTests.swift",
        "WikiTutorialTest.swift"
      ],
      "target_dependencies" : [
        "MobiusCore",
        "MobiusExtras",
        "MobiusThrowableAssertion"
      ],
      "type" : "test"
    },
    {
      "c99name" : "MobiusExtras",
      "module_type" : "SwiftTarget",
      "name" : "MobiusExtras",
      "path" : "MobiusExtras/Source",
      "product_memberships" : [
        "MobiusExtras"
      ],
      "sources" : [
        "BeginnerLoop.swift",
        "ConnectableClass.swift",
        "ConnectableContramap.swift",
        "ConnectableMap.swift",
        "Copyable.swift",
        "EventSourceMap.swift",
        "SimpleLogger.swift"
      ],
      "target_dependencies" : [
        "MobiusCore"
      ],
      "type" : "library"
    },
    {
      "c99name" : "MobiusCoreTests",
      "module_type" : "SwiftTarget",
      "name" : "MobiusCoreTests",
      "path" : "MobiusCore/Test",
      "product_dependencies" : [
        "Nimble",
        "Quick"
      ],
      "sources" : [
        "AnonymousDisposableTests.swift",
        "AnyConnectionTests.swift",
        "AnyMobiusLoggerTests.swift",
        "AsyncDispatchQueueConnectableTests.swift",
        "CompositeDisposableTests.swift",
        "ConnectablePublisherTests.swift",
        "EffectHandlers/AnyEffectHandlerTests.swift",
        "EffectHandlers/CallbackTests.swift",
        "EffectHandlers/EffectHandlerTests.swift",
        "EffectHandlers/EffectRouterDSLTests.swift",
        "EffectHandlers/EffectRouterTests.swift",
        "EffectHandlers/EnumRouteTests.swift",
        "EventRouterDisposalLogicalRaceRegressionTest.swift",
        "EventSources/AnyEventSourceTests.swift",
        "EventSources/CompositeEventSourceBuilderTests.swift",
        "FirstTests.swift",
        "InitializationTests.swift",
        "LoggingInitiateTests.swift",
        "LoggingUpdateTests.swift",
        "MobiusControllerTests.swift",
        "MobiusHooksTests.swift",
        "MobiusIntegrationTests.swift",
        "MobiusLoopTests.swift",
        "NextTests.swift",
        "NonReentrancyTests.swift",
        "Task+DisposableTests.swift",
        "TestingErrorHandler.swift",
        "TestingUtil.swift",
        "WorkBagTests.swift"
      ],
      "target_dependencies" : [
        "MobiusCore",
        "MobiusThrowableAssertion"
      ],
      "type" : "test"
    },
    {
      "c99name" : "MobiusCore",
      "module_type" : "SwiftTarget",
      "name" : "MobiusCore",
      "path" : "MobiusCore/Source",
      "product_dependencies" : [
        "CasePaths"
      ],
      "product_memberships" : [
        "MobiusCore",
        "MobiusExtras",
        "MobiusNimble",
        "MobiusTest"
      ],
      "sources" : [
        "AsyncDispatchQueueConnectable.swift",
        "AsyncStartStopStateMachine.swift",
        "ConcurrentAccessDetector.swift",
        "Connectable.swift",
        "ConnectablePublisher.swift",
        "Connection.swift",
        "Consumer.swift",
        "Disposables/AnonymousDisposable.swift",
        "Disposables/CompositeDisposable.swift",
        "Disposables/Disposable.swift",
        "Disposables/Task+Disposable.swift",
        "EffectHandlers/EffectCallback.swift",
        "EffectHandlers/EffectExecutor.swift",
        "EffectHandlers/EffectHandler.swift",
        "EffectHandlers/EffectRouter.swift",
        "EffectHandlers/EffectRouterDSL.swift",
        "EffectHandlers/EnumRoute.swift",
        "EffectHandlers/ThreadSafeConnectable.swift",
        "EventSources/AnyEventSource.swift",
        "EventSources/CompositeEventSourceBuilder.swift",
        "EventSources/EventSource.swift",
        "First.swift",
        "Lock.swift",
        "LoggingAdaptors.swift",
        "Mobius.swift",
        "MobiusController.swift",
        "MobiusHooks.swift",
        "MobiusLogger.swift",
        "MobiusLoop.swift",
        "Next.swift",
        "WorkBag.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.2"
}
{
  "workspace" : {
    "name" : "spi-builder-workspace",
    "schemes" : [
      "Mobius-Package",
      "MobiusCore",
      "MobiusExtras",
      "MobiusNimble",
      "MobiusTest"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-26.0.0-Beta.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme Mobius-Package -destination generic/platform=watchOS
Command line invocation:
    /Applications/Xcode-26.0.0-Beta.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 Mobius-Package -destination generic/platform=watchOS
Resolve Package Graph
Resolved source packages:
  CwlPreconditionTesting: https://github.com/mattgallagher/CwlPreconditionTesting.git @ 2.2.2
  swift-algorithms: https://github.com/apple/swift-algorithms.git @ 1.2.1
  swift-argument-parser: https://github.com/apple/swift-argument-parser.git @ 1.6.1
  CwlCatchException: https://github.com/mattgallagher/CwlCatchException.git @ 2.2.1
  Quick: https://github.com/Quick/Quick @ 7.6.2
  swift-case-paths: https://github.com/pointfreeco/swift-case-paths @ 0.10.1
  Mobius: /Users/admin/builder/spi-builder-workspace
  swift-numerics: https://github.com/apple/swift-numerics.git @ 1.0.3
  Nimble: https://github.com/Quick/Nimble @ 10.0.0
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (12 targets)
    Target 'MobiusTest' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusTest' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusCore' in project 'Mobius'
        ➜ Explicit dependency on target 'CasePaths' in project 'swift-case-paths'
    Target 'MobiusNimble' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusNimble' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusCore' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusTest' in project 'Mobius'
        ➜ Explicit dependency on target 'CasePaths' in project 'swift-case-paths'
        ➜ Explicit dependency on target 'Nimble' in project 'Nimble'
    Target 'MobiusNimble' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusCore' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusTest' in project 'Mobius'
        ➜ Explicit dependency on target 'CasePaths' in project 'swift-case-paths'
        ➜ Explicit dependency on target 'Nimble' in project 'Nimble'
    Target 'Nimble' in project 'Nimble'
        ➜ Explicit dependency on target 'Nimble' in project 'Nimble'
    Target 'Nimble' in project 'Nimble' (no dependencies)
    Target 'MobiusTest' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusCore' in project 'Mobius'
        ➜ Explicit dependency on target 'CasePaths' in project 'swift-case-paths'
    Target 'MobiusExtras' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusExtras' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusCore' in project 'Mobius'
        ➜ Explicit dependency on target 'CasePaths' in project 'swift-case-paths'
    Target 'MobiusExtras' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusCore' in project 'Mobius'
        ➜ Explicit dependency on target 'CasePaths' in project 'swift-case-paths'
    Target 'MobiusCore' in project 'Mobius'
        ➜ Explicit dependency on target 'MobiusCore' in project 'Mobius'
        ➜ Explicit dependency on target 'CasePaths' in project 'swift-case-paths'
    Target 'MobiusCore' in project 'Mobius'
        ➜ Explicit dependency on target 'CasePaths' in project 'swift-case-paths'
    Target 'CasePaths' in project 'swift-case-paths'
        ➜ Explicit dependency on target 'CasePaths' in project 'swift-case-paths'
    Target 'CasePaths' in project 'swift-case-paths' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
ExecuteExternalTool /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc --version
ExecuteExternalTool /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -isysroot /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.0.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-26.0.0-Beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld -version_details
Build description signature: 34392a32b7255195c0e5bc545e68b74b
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/34392a32b7255195c0e5bc545e68b74b.xcbuilddata
error: The package product 'CasePaths' requires minimum platform version 5.0 for the watchOS platform, but this target supports 4.0 (in target 'MobiusTest' from project 'Mobius')
error: The package product 'CasePaths' requires minimum platform version 5.0 for the watchOS platform, but this target supports 4.0 (in target 'MobiusNimble' from project 'Mobius')
error: The package product 'Nimble' requires minimum platform version 5.0 for the watchOS platform, but this target supports 4.0 (in target 'MobiusNimble' from project 'Mobius')
error: The package product 'CasePaths' requires minimum platform version 5.0 for the watchOS platform, but this target supports 4.0 (in target 'MobiusCore' from project 'Mobius')
error: The package product 'CasePaths' requires minimum platform version 5.0 for the watchOS platform, but this target supports 4.0 (in target 'MobiusExtras' from project 'Mobius')
** BUILD FAILED **
The following build commands failed:
	Building workspace spi-builder-workspace with scheme Mobius-Package
(1 failure)
BUILD FAILURE 6.2 watchOS