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Track the adoption of Swift 6 strict concurrency checks for data race safety. How many packages are Ready for Swift 6?

Build Information

Failed to build Floaty with Swift 6.1 for watchOS using Xcode 16.3.

Build Command

Build command unavailable

Build Log

========================================
RunAll
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Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
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Clone URL: https://github.com/kciter/Floaty.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/kciter/Floaty
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at d0e637d Update FUNDING.yml
Cloned https://github.com/kciter/Floaty.git
Revision (git rev-parse @):
d0e637db60828d49e403ff0b7dc11b1458e67095
SUCCESS checkout https://github.com/kciter/Floaty.git at master
========================================
Build
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Selected platform:         watchOS
Swift version:             6.1
Building package at path:  $PWD
https://github.com/kciter/Floaty.git
https://github.com/kciter/Floaty.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Floaty",
  "name" : "Floaty",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "10.0"
    }
  ],
  "products" : [
    {
      "name" : "Floaty",
      "targets" : [
        "Floaty"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "Floaty",
      "module_type" : "SwiftTarget",
      "name" : "Floaty",
      "path" : "Sources",
      "product_memberships" : [
        "Floaty"
      ],
      "sources" : [
        "Floaty.swift",
        "FloatyDelegate.swift",
        "FloatyItem.swift",
        "FloatyManager.swift",
        "FloatyViewController.swift",
        "FloatyWindow.swift",
        "UIView+Draggable.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.1"
}
Command line invocation:
    /Applications/Xcode-16.3.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
resolved source packages:
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Floaty",
  "name" : "Floaty",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "10.0"
    }
  ],
  "products" : [
    {
      "name" : "Floaty",
      "targets" : [
        "Floaty"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "Floaty",
      "module_type" : "SwiftTarget",
      "name" : "Floaty",
      "path" : "Sources",
      "product_memberships" : [
        "Floaty"
      ],
      "sources" : [
        "Floaty.swift",
        "FloatyDelegate.swift",
        "FloatyItem.swift",
        "FloatyManager.swift",
        "FloatyViewController.swift",
        "FloatyWindow.swift",
        "UIView+Draggable.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.1"
}
{
  "project" : {
    "configurations" : [
      "Debug",
      "Release"
    ],
    "name" : "Floaty",
    "schemes" : [
      "Floaty"
    ],
    "targets" : [
      "Floaty"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme Floaty -destination generic/platform=watchOS OTHER_SWIFT_FLAGS=-stats-output-dir .stats -strict-concurrency=complete -enable-upcoming-feature StrictConcurrency -enable-upcoming-feature DisableOutwardActorInference -enable-upcoming-feature GlobalActorIsolatedTypesUsability -enable-upcoming-feature InferSendableFromCaptures
Command line invocation:
    /Applications/Xcode-16.3.0.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 Floaty -destination generic/platform=watchOS "OTHER_SWIFT_FLAGS=-stats-output-dir .stats -strict-concurrency=complete -enable-upcoming-feature StrictConcurrency -enable-upcoming-feature DisableOutwardActorInference -enable-upcoming-feature GlobalActorIsolatedTypesUsability -enable-upcoming-feature InferSendableFromCaptures"
Build settings from command line:
    OTHER_SWIFT_FLAGS = -stats-output-dir .stats -strict-concurrency=complete -enable-upcoming-feature StrictConcurrency -enable-upcoming-feature DisableOutwardActorInference -enable-upcoming-feature GlobalActorIsolatedTypesUsability -enable-upcoming-feature InferSendableFromCaptures
2025-04-26 20:32:44.649 xcodebuild[575:3276] Writing error result bundle to /var/folders/5k/5yc19ymj0jqd5v0zvgfqz0xw0000gn/T/ResultBundle_2025-26-04_20-32-0044.xcresult
xcodebuild: error: Unable to find a destination matching the provided destination specifier:
		{ generic:1, platform:watchOS }
	Available destinations for the "Floaty" scheme:
		{ platform:macOS, arch:arm64, variant:Mac Catalyst, id:796184f7d91d7a0e60919c15b2fa4baf6222a614, name:My Mac }
		{ platform:macOS, arch:x86_64, variant:Mac Catalyst, id:796184f7d91d7a0e60919c15b2fa4baf6222a614, name:My Mac }
		{ platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:796184f7d91d7a0e60919c15b2fa4baf6222a614, name:My Mac }
		{ platform:iOS, id:dvtdevice-DVTiPhonePlaceholder-iphoneos:placeholder, name:Any iOS Device }
		{ platform:iOS Simulator, id:dvtdevice-DVTiOSDeviceSimulatorPlaceholder-iphonesimulator:placeholder, name:Any iOS Simulator Device }
		{ platform:macOS, variant:Mac Catalyst, name:Any Mac }
INFRASTRUCTURE ERROR (status: destinationUnavailable