JunoUI – Build Information – Swift Package Index

Build Information

Failed to build JunoUI, reference main (c7c996), with Swift 6.4 for macOS (SPM) on 20 Sep 2026 08:12:51 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
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Builder version: 5.1.0
Interrupt handler set up.
========================================
Checkout
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Clone URL: https://github.com/christianselig/JunoSlider.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/christianselig/JunoSlider
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at c7c9967 Create LICENSE
Cloned https://github.com/christianselig/JunoSlider.git
Revision (git rev-parse @):
c7c9967c0107b3753bf45f23babba7f94d82a684
SUCCESS checkout https://github.com/christianselig/JunoSlider.git at main
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.4
Building package at path:  $PWD
https://github.com/christianselig/JunoSlider.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun swift build --arch arm64
Building for debugging...
[Planning deferred tasks]
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[88 / 97] JunoUI
error: SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/JunoUI/JunoSlider.swift failed with a nonzero exit code. Command line:     cd /Users/admin/builder
    builtin-SwiftPerFileCompile JunoSlider.swift
/Users/admin/builder/spi-builder-workspace/Sources/JunoUI/JunoSlider.swift:52:26: [1;31merror: [1;39m'shadow' is only available in macOS 13.0 or newer[0;0m
  [0;36m2 |[0;0m
  [0;36m3 |[0;0m /// A slider that expands on selection.
  [0;36m4 |[0;0m public struct JunoSlider: View {
    [0;36m|[0;0m               `- [1;39mnote: [1;39madd '@available' attribute to enclosing struct[0;0m
  [0;36m5 |[0;0m     @Binding var sliderValue: CGFloat
  [0;36m6 |[0;0m     let maxSliderValue: CGFloat
    [0;36m:[0;0m
 [0;36m32 |[0;0m     }
 [0;36m33 |[0;0m
 [0;36m34 |[0;0m     public var body: some View {
    [0;36m|[0;0m                `- [1;39mnote: [1;39madd '@available' attribute to enclosing property[0;0m
 [0;36m35 |[0;0m         ZStack {
 [0;36m36 |[0;0m             // visionOS (on device) does not like when drag targets are smaller than 40pt tall, so add an almost-transparent (as it still needs to be interactive) that enforces an effective minimum height. If the slider is tall than this on its own it's essentially just ignored.
    [0;36m:[0;0m
 [0;36m50 |[0;0m                 .foregroundStyle(
 [0;36m51 |[0;0m                     Color(white: 0.1, opacity: 0.5)
 [0;36m52 |[0;0m                         .shadow(.inner(color: .black.opacity(0.3), radius: 3.0, y: 2.0))
    [0;36m|[0;0m                          |- [1;31merror: [1;39m'shadow' is only available in macOS 13.0 or newer[0;0m
    [0;36m|[0;0m                          `- [1;39mnote: [1;39madd 'if #available' version check[0;0m
 [0;36m53 |[0;0m                 )
 [0;36m54 |[0;0m                 .shadow(color: .white.opacity(0.2), radius: 1, y: 1)
/Users/admin/builder/spi-builder-workspace/Sources/JunoUI/JunoSlider.swift:68:32: [1;31merror: [1;39m'hoverEffect' is unavailable in macOS[0;0m
 [0;36m66 |[0;0m                 }
 [0;36m67 |[0;0m                 .clipShape(.capsule) // Best attempt at fixing a bug https://twitter.com/ChristianSelig/status/1757139789457829902
 [0;36m68 |[0;0m                 .contentShape(.[4;39mhoverEffect[0;0m, .capsule)
    [0;36m|[0;0m                                `- [1;31merror: [1;39m'hoverEffect' is unavailable in macOS[0;0m
 [0;36m69 |[0;0m         }
 [0;36m70 |[0;0m         .gesture(DragGesture(minimumDistance: 0.0)
SwiftUI.ContentShapeKinds.hoverEffect:5:21: [1;39mnote: [1;39m'hoverEffect' has been explicitly marked unavailable here[0;0m
[0;36m3 |[0;0m   @available(macOS, unavailable)
[0;36m4 |[0;0m   @available(watchOS, unavailable)
[0;36m5 |[0;0m   public static let hoverEffect: ContentShapeKinds}
  [0;36m|[0;0m                     `- [1;39mnote: [1;39m'hoverEffect' has been explicitly marked unavailable here[0;0m
[0;36m6 |[0;0m
/Users/admin/builder/spi-builder-workspace/Sources/JunoUI/JunoSlider.swift:106:10: [1;31merror: [1;39m'hoverEffect' is unavailable in macOS[0;0m
[0;36m104 |[0;0m             }
[0;36m105 |[0;0m         )
[0;36m106 |[0;0m         .[4;39mhoverEffect[0;0m(.highlight)
    [0;36m|[0;0m          `- [1;31merror: [1;39m'hoverEffect' is unavailable in macOS[0;0m
[0;36m107 |[0;0m         .animation(.default, value: isGestureActive)
[0;36m108 |[0;0m         .accessibilityRepresentation {
SwiftUI.View.hoverEffect:5:27: [1;39mnote: [1;39m'hoverEffect' has been explicitly marked unavailable here[0;0m
[0;36m3 |[0;0m   @available(macOS, unavailable)
[0;36m4 |[0;0m   @available(watchOS, unavailable)
[0;36m5 |[0;0m   nonisolated public func hoverEffect(_ effect: HoverEffect = .automatic) -> some View
  [0;36m|[0;0m                           `- [1;39mnote: [1;39m'hoverEffect' has been explicitly marked unavailable here[0;0m
[0;36m6 |[0;0m   }
[0;36m7 |[0;0m
Failed frontend command:
/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend -frontend -c -primary-file /Users/admin/builder/spi-builder-workspace/Sources/JunoUI/JunoSlider.swift -emit-dependencies-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/JunoUI.build/Debug/JunoUI-t.build/Objects-normal/arm64/JunoSlider.d -emit-const-values-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/JunoUI.build/Debug/JunoUI-t.build/Objects-normal/arm64/JunoSlider.swiftconstvalues -emit-reference-dependencies-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/JunoUI.build/Debug/JunoUI-t.build/Objects-normal/arm64/JunoSlider.swiftdeps -serialize-diagnostics-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/JunoUI.build/Debug/JunoUI-t.build/Objects-normal/arm64/JunoSlider.dia -target arm64-apple-macos12.0 -disable-cross-import-overlay-search -load-resolved-plugin /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins/libFoundationMacros.dylib\#/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server\#FoundationMacros -load-resolved-plugin /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins/libObservationMacros.dylib\#/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server\#ObservationMacros -load-resolved-plugin /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins/libPreviewsMacros.dylib\#/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server\#PreviewsMacros -load-resolved-plugin /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins/libSwiftMacros.dylib\#/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server\#SwiftMacros -load-resolved-plugin /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins/libSwiftUIMacros.dylib\#/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server\#SwiftUIMacros -disable-implicit-swift-modules -Xcc -fno-implicit-modules -Xcc -fno-implicit-module-maps -explicit-swift-module-map-file /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/JunoUI.build/Debug/JunoUI-t.build/Objects-normal/arm64/JunoUI-dependencies-1.json -Xllvm -aarch64-use-tbi -enable-objc-interop -stack-check -sdk /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk -I /Users/admin/builder/spi-builder-workspace/.build/out/Products/Debug -Isystem /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.build/out/Products/Debug -F /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks -module-cache-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/SwiftExplicitPrecompiledModules -color-diagnostics -Xcc -fcolor-diagnostics -enable-testing -g -debug-info-format\=dwarf -dwarf-version\=4 -swift-version 5 -Onone -D SWIFT_PACKAGE -D DEBUG -D SWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -D Xcode -serialize-debugging-options -enable-experimental-feature DebugDescriptionMacro -empty-abi-descriptor -validate-clang-modules-once -clang-build-session-file /Users/admin/builder/spi-builder-workspace/.build/out/ModuleCache.noindex/Session.modulevalidation -Xcc -working-directory -Xcc /Users/admin/builder -enable-anonymous-context-mangled-names -file-compilation-dir /Users/admin/builder -Xcc -D_LIBCPP_HARDENING_MODE\=_LIBCPP_HARDENING_MODE_DEBUG -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.build/out/SDKStatCaches.noindex/macosx27.0-26A425-80c5bbf1d171475443272936d42f90a36a22442a12e9d48fe1a705f55a1adfc4.sdkstatcache -Xcc -fmodules-prune-interval\=86400 -Xcc -fmodules-prune-after\=345600 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Products/Debug/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/JunoUI.build/Debug/JunoUI-t.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/JunoUI.build/Debug/JunoUI-t.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/JunoUI.build/Debug/JunoUI-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name JunoUI -package-name spi_builder_workspace -const-gather-protocols-file /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/JunoUI.build/Debug/JunoUI-t.build/Objects-normal/arm64/JunoUI_const_extract_protocols.json -disable-clang-spi -clang-target arm64-apple-macos27.0 -target-sdk-version 27.0 -target-sdk-name macosx27.0 -in-process-plugin-server-path /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/libSwiftInProcPluginServer.dylib -parse-as-library -o /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/JunoUI.build/Debug/JunoUI-t.build/Objects-normal/arm64/JunoSlider.o -debug-module-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/JunoUI.build/Debug/JunoUI-t.build/Objects-normal/arm64/JunoUI.swiftmodule -index-unit-output-path /JunoUI.build/Debug/JunoUI-t.build/Objects-normal/arm64/JunoSlider.o -index-store-path /Users/admin/builder/spi-builder-workspace/.build/out -index-system-modules
error: Build failed
BUILD FAILURE 6.4 macosSpm