Swift Package IndexBuild Information
Failed to build Mobius, reference master (74baa7), with Swift 6.3 for watchOS using Xcode 26.4 on 21 Apr 2026 19:57:08 UTC.
Build Command
env DEVELOPER_DIR=/Applications/Xcode-26.4.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme Mobius-Package -destination generic/platform=watchOSBuild Log
========================================
RunAll
========================================
Builder version: 4.70.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/spotify/Mobius.swift.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/spotify/Mobius.swift
* branch master -> FETCH_HEAD
* [new branch] master -> origin/master
HEAD is now at 74baa7e Merge pull request #209 from mjburghard/add-EmptyDisposable
Cloned https://github.com/spotify/Mobius.swift.git
Revision (git rev-parse @):
74baa7e07b86ae4c2673204a92230db397b8a6ae
SUCCESS checkout https://github.com/spotify/Mobius.swift.git at master
========================================
Build
========================================
Selected platform: watchOS
Swift version: 6.3
Building package at path: $PWD
https://github.com/spotify/Mobius.swift.git
Command line invocation:
/Applications/Xcode-26.4.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Fetching from https://github.com/pointfreeco/swift-case-paths
Fetching from https://github.com/Quick/Nimble
Fetching from https://github.com/Quick/Quick
Fetching from https://github.com/mattgallagher/CwlPreconditionTesting.git
Fetching from https://github.com/mattgallagher/CwlCatchException.git
Fetching from https://github.com/apple/swift-algorithms.git
Fetching from https://github.com/apple/swift-argument-parser.git
Fetching from https://github.com/apple/swift-numerics.git
Creating working copy of package ‘swift-numerics’
Checking out 1.1.1 of package ‘swift-numerics’
Creating working copy of package ‘swift-algorithms’
Checking out 1.2.1 of package ‘swift-algorithms’
Creating working copy of package ‘swift-argument-parser’
Checking out 1.7.1 of package ‘swift-argument-parser’
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 ‘swift-case-paths’
Checking out 0.10.1 of package ‘swift-case-paths’
Creating working copy of package ‘Nimble’
Checking out 10.0.0 of package ‘Nimble’
Creating working copy of package ‘CwlPreconditionTesting’
Checking out 2.2.2 of package ‘CwlPreconditionTesting’
Resolve Package Graph
Resolved source packages:
swift-argument-parser: https://github.com/apple/swift-argument-parser.git @ 1.7.1
swift-numerics: https://github.com/apple/swift-numerics.git @ 1.1.1
swift-algorithms: https://github.com/apple/swift-algorithms.git @ 1.2.1
swift-case-paths: https://github.com/pointfreeco/swift-case-paths @ 0.10.1
CwlCatchException: https://github.com/mattgallagher/CwlCatchException.git @ 2.2.1
Mobius: /Users/admin/builder/spi-builder-workspace
Nimble: https://github.com/Quick/Nimble @ 10.0.0
Quick: https://github.com/Quick/Quick @ 7.6.2
CwlPreconditionTesting: https://github.com/mattgallagher/CwlPreconditionTesting.git @ 2.2.2
resolved source packages: swift-argument-parser, swift-numerics, swift-algorithms, swift-case-paths, CwlCatchException, Mobius, Nimble, Quick, CwlPreconditionTesting
2026-04-21 15:56:38.043 xcodebuild[529:3082] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
{
"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/EmptyDisposable.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"
]
}
}
2026-04-21 15:56:49.986 xcodebuild[1006:5481] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-26.4.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme Mobius-Package -destination generic/platform=watchOS
Command line invocation:
/Applications/Xcode-26.4.0.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:
swift-numerics: https://github.com/apple/swift-numerics.git @ 1.1.1
Mobius: /Users/admin/builder/spi-builder-workspace
CwlCatchException: https://github.com/mattgallagher/CwlCatchException.git @ 2.2.1
Nimble: https://github.com/Quick/Nimble @ 10.0.0
swift-algorithms: https://github.com/apple/swift-algorithms.git @ 1.2.1
swift-argument-parser: https://github.com/apple/swift-argument-parser.git @ 1.7.1
CwlPreconditionTesting: https://github.com/mattgallagher/CwlPreconditionTesting.git @ 2.2.2
swift-case-paths: https://github.com/pointfreeco/swift-case-paths @ 0.10.1
Quick: https://github.com/Quick/Quick @ 7.6.2
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-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc --version
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -isysroot /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld -version_details
Build description signature: e88cee3d2512cc1c6266e1cb7f30b8e8
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/e88cee3d2512cc1c6266e1cb7f30b8e8.xcbuilddata
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 '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 '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')
2026-04-21 15:56:56.836 xcodebuild[1026:5640] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
** BUILD FAILED **
The following build commands failed:
Building workspace spi-builder-workspace with scheme Mobius-Package
(1 failure)
Command line invocation:
/Applications/Xcode-26.4.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
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
swift-argument-parser: https://github.com/apple/swift-argument-parser.git @ 1.7.1
Nimble: https://github.com/Quick/Nimble @ 10.0.0
CwlPreconditionTesting: https://github.com/mattgallagher/CwlPreconditionTesting.git @ 2.2.2
swift-numerics: https://github.com/apple/swift-numerics.git @ 1.1.1
swift-case-paths: https://github.com/pointfreeco/swift-case-paths @ 0.10.1
CwlCatchException: https://github.com/mattgallagher/CwlCatchException.git @ 2.2.1
Quick: https://github.com/Quick/Quick @ 7.6.2
resolved source packages: swift-algorithms, Mobius, swift-argument-parser, Nimble, CwlPreconditionTesting, swift-numerics, swift-case-paths, CwlCatchException, Quick
2026-04-21 15:57:02.117 xcodebuild[1127:6234] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
{
"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/EmptyDisposable.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"
]
}
}
2026-04-21 15:57:04.749 xcodebuild[1147:6373] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-26.4.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme Mobius-Package -destination generic/platform=watchOS
Command line invocation:
/Applications/Xcode-26.4.0.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:
Mobius: /Users/admin/builder/spi-builder-workspace
CwlCatchException: https://github.com/mattgallagher/CwlCatchException.git @ 2.2.1
swift-algorithms: https://github.com/apple/swift-algorithms.git @ 1.2.1
swift-argument-parser: https://github.com/apple/swift-argument-parser.git @ 1.7.1
swift-case-paths: https://github.com/pointfreeco/swift-case-paths @ 0.10.1
Nimble: https://github.com/Quick/Nimble @ 10.0.0
swift-numerics: https://github.com/apple/swift-numerics.git @ 1.1.1
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-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc --version
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -isysroot /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS26.4.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld -version_details
Build description signature: e88cee3d2512cc1c6266e1cb7f30b8e8
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/e88cee3d2512cc1c6266e1cb7f30b8e8.xcbuilddata
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 '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')
2026-04-21 15:57:07.155 xcodebuild[1160:6468] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
** BUILD FAILED **
The following build commands failed:
Building workspace spi-builder-workspace with scheme Mobius-Package
(1 failure)
BUILD FAILURE 6.3 watchOS