Swift Package Index

Build Information

Failed to build swift-differentiation, reference main (6403b0), with Swift 6.1 for iOS using Xcode 16.3 on 20 Apr 2026 20:02:03 UTC.

Build Command

No build command. This typically means the build failed at an early stage where we determine the build command.

Build Log

========================================
RunAll
========================================
Builder version: 4.70.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/differentiable-swift/swift-differentiation.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/differentiable-swift/swift-differentiation
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 6403b0a chore: bump minimum stdlib dependency
Cloned https://github.com/differentiable-swift/swift-differentiation.git
Revision (git rev-parse @):
6403b0a43d3fcbc798e3f84574e2f151bf398478
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/differentiable-swift/swift-differentiation.git at main
========================================
Build
========================================
Selected platform:         iOS
Swift version:             6.1
Building package at path:  $PWD
https://github.com/differentiable-swift/swift-differentiation.git
https://github.com/differentiable-swift/swift-differentiation.git
{
  "dependencies" : [
    {
      "identity" : "swift-differentiation-stdlib",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "602.0.1",
            "upper_bound" : "603.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/differentiable-swift/swift-differentiation-stdlib.git"
    }
  ],
  "manifest_display_name" : "swift-differentiation",
  "name" : "swift-differentiation",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "26.0"
    },
    {
      "name" : "ios",
      "version" : "26.0"
    }
  ],
  "products" : [
    {
      "name" : "Differentiation",
      "targets" : [
        "Differentiation"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "DifferentiationTests",
      "module_type" : "SwiftTarget",
      "name" : "DifferentiationTests",
      "path" : "Tests/DifferentiationTests",
      "sources" : [
        "Array+UpdateTests.swift",
        "Collection+DifferentiableMethodsTests.swift",
        "CollectionTests.swift",
        "DerivativesOfNativeFunctionsTests.swift",
        "Dictionary+DifferentiationTests.swift",
        "Dictionary+UpdateTests.swift",
        "Foundation+VJPsTests.swift",
        "InlineArrayTests.swift",
        "Optional+DifferentiableMapTests.swift",
        "Repeated+DifferentiableTests.swift",
        "RunWithoutDerivativeTests.swift",
        "Sequence+MinMaxVJPsTests.swift",
        "Zip+DifferentiableTests.swift"
      ],
      "target_dependencies" : [
        "Differentiation"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Differentiation",
      "module_type" : "SwiftTarget",
      "name" : "Differentiation",
      "path" : "Sources/Differentiation",
      "product_dependencies" : [
        "_Differentiation"
      ],
      "product_memberships" : [
        "Differentiation"
      ],
      "sources" : [
        "Array+Update.swift",
        "DerivativesOfNativeFunctions.swift",
        "Dictionary+Differentiation.swift",
        "Dictionary+Update.swift",
        "DifferentiableCollection.swift",
        "DifferentiableCollections/Array+DifferentiableMethods.swift",
        "DifferentiableCollections/ArrayDifferentiableView+Collection.swift",
        "DifferentiableCollections/ArraySlice+Differentiable.swift",
        "DifferentiableCollections/ArraySlice+DifferentiableMethods.swift",
        "DifferentiableCollections/ArraySliceDifferentiableView+Collection.swift",
        "DifferentiableCollections/ArraySliceDifferentiableView.swift",
        "DifferentiableCollections/ContiguousArray+Differentiable.swift",
        "DifferentiableCollections/ContiguousArray+DifferentiableMethods.swift",
        "DifferentiableCollections/ContiguousArrayDifferentiableView+Collection.swift",
        "DifferentiableCollections/ContiguousArrayDifferentiableView.swift",
        "DifferentiableZip/ValueWithPullbackOverloads.swift",
        "DifferentiableZip/ZipSequence+Arity10.swift",
        "DifferentiableZip/ZipSequence+Arity11.swift",
        "DifferentiableZip/ZipSequence+Arity12.swift",
        "DifferentiableZip/ZipSequence+Arity13.swift",
        "DifferentiableZip/ZipSequence+Arity14.swift",
        "DifferentiableZip/ZipSequence+Arity2.swift",
        "DifferentiableZip/ZipSequence+Arity3.swift",
        "DifferentiableZip/ZipSequence+Arity4.swift",
        "DifferentiableZip/ZipSequence+Arity5.swift",
        "DifferentiableZip/ZipSequence+Arity6.swift",
        "DifferentiableZip/ZipSequence+Arity7.swift",
        "DifferentiableZip/ZipSequence+Arity8.swift",
        "DifferentiableZip/ZipSequence+Arity9.swift",
        "DifferentiableZip/ZipWith+Arity10.swift",
        "DifferentiableZip/ZipWith+Arity11.swift",
        "DifferentiableZip/ZipWith+Arity12.swift",
        "DifferentiableZip/ZipWith+Arity13.swift",
        "DifferentiableZip/ZipWith+Arity14.swift",
        "DifferentiableZip/ZipWith+Arity2.swift",
        "DifferentiableZip/ZipWith+Arity3.swift",
        "DifferentiableZip/ZipWith+Arity4.swift",
        "DifferentiableZip/ZipWith+Arity5.swift",
        "DifferentiableZip/ZipWith+Arity6.swift",
        "DifferentiableZip/ZipWith+Arity7.swift",
        "DifferentiableZip/ZipWith+Arity8.swift",
        "DifferentiableZip/ZipWith+Arity9.swift",
        "DifferentiableZip/ZipWithInout+Arity10.swift",
        "DifferentiableZip/ZipWithInout+Arity11.swift",
        "DifferentiableZip/ZipWithInout+Arity12.swift",
        "DifferentiableZip/ZipWithInout+Arity13.swift",
        "DifferentiableZip/ZipWithInout+Arity14.swift",
        "DifferentiableZip/ZipWithInout+Arity2.swift",
        "DifferentiableZip/ZipWithInout+Arity3.swift",
        "DifferentiableZip/ZipWithInout+Arity4.swift",
        "DifferentiableZip/ZipWithInout+Arity5.swift",
        "DifferentiableZip/ZipWithInout+Arity6.swift",
        "DifferentiableZip/ZipWithInout+Arity7.swift",
        "DifferentiableZip/ZipWithInout+Arity8.swift",
        "DifferentiableZip/ZipWithInout+Arity9.swift",
        "Differentiation.swift",
        "Foundation+VJPs.swift",
        "InlineArray+Differentiation.swift",
        "Optional+DifferentiableMap.swift",
        "Repeated+Differentiable.swift",
        "RunWithoutDerivative.swift",
        "Sequence+MinMaxVJPs.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "6.1"
}
Command line invocation:
    /Applications/Xcode-16.3.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Fetching from https://github.com/differentiable-swift/swift-differentiation-stdlib.git
Resolve Package Graph
Updating from https://github.com/differentiable-swift/swift-differentiation-stdlib.git
Resolved source packages:
  spi-builder-workspace: (null)
2026-04-20 13:02:02.657 xcodebuild[519:2963] Writing error result bundle to /var/folders/5k/5yc19ymj0jqd5v0zvgfqz0xw0000gn/T/ResultBundle_2026-20-04_13-02-0002.xcresult
xcodebuild: error: Could not resolve package dependencies:
  Failed to resolve dependencies Dependencies could not be resolved because 'swift-differentiation-stdlib' contains incompatible tools version (6.2.0) and root depends on 'swift-differentiation-stdlib' 602.0.1..<603.0.0.
Command line invocation:
    /Applications/Xcode-16.3.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Updating from https://github.com/differentiable-swift/swift-differentiation-stdlib.git
Resolved source packages:
  spi-builder-workspace: (null)
2026-04-20 13:02:03.869 xcodebuild[706:3971] Writing error result bundle to /var/folders/5k/5yc19ymj0jqd5v0zvgfqz0xw0000gn/T/ResultBundle_2026-20-04_13-02-0003.xcresult
xcodebuild: error: Could not resolve package dependencies:
  Failed to resolve dependencies Dependencies could not be resolved because 'swift-differentiation-stdlib' contains incompatible tools version (6.2.0) and root depends on 'swift-differentiation-stdlib' 602.0.1..<603.0.0.
BUILD FAILURE 6.1 iOS