Swift Package IndexBuild Information
Failed to build mlx-swift, reference 0.10.0 (7838f8), with Swift 6.4 for macOS (Xcode) using Xcode 27.0 on 25 Sep 2026 16:30:34 UTC.
Build Command
env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme mlx-swift-Package -destination platform=macOS,arch=arm64Build Log
========================================
RunAll
========================================
Builder version: 5.1.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/DePasqualeOrg/mlx-swift.git
Reference: 0.10.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/DePasqualeOrg/mlx-swift
* tag 0.10.0 -> FETCH_HEAD
HEAD is now at 7838f8c adopt latest mlx-c and mlx v0.3.0 (#6)
Submodule path 'Source/Cmlx/mlx': checked out 'bf7cd29970b603ed3e177cb2f4f6dc246a653555'
Submodule path 'Source/Cmlx/mlx-c': checked out '096e4196354f0e72331140f6049c1c1d15719cbe'
Submodule 'submodules/mlx' (https://github.com/ml-explore/mlx) registered for path 'Source/Cmlx/mlx'
Submodule 'submodules/mlx-c' (https://github.com/ml-explore/mlx-c) registered for path 'Source/Cmlx/mlx-c'
Cloning into '/Users/admin/builder/spi-builder-workspace/Source/Cmlx/mlx'...
Cloning into '/Users/admin/builder/spi-builder-workspace/Source/Cmlx/mlx-c'...
From https://github.com/ml-explore/mlx-c
* branch 096e4196354f0e72331140f6049c1c1d15719cbe -> FETCH_HEAD
Cloned https://github.com/DePasqualeOrg/mlx-swift.git
Revision (git rev-parse @):
7838f8cd93499f3d9e9a35b87cb74fe2664b325f
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/DePasqualeOrg/mlx-swift.git at 0.10.0
========================================
Build
========================================
Selected platform: macosXcodebuild
Swift version: 6.4
Building package at path: $PWD
https://github.com/DePasqualeOrg/mlx-swift.git
Command line invocation:
/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Fetching from https://github.com/apple/swift-numerics
Creating working copy of package ‘swift-numerics’
Checking out 1.1.1 of package ‘swift-numerics’
Resolve Package Graph
Resolved source packages:
swift-numerics: https://github.com/apple/swift-numerics @ 1.1.1
mlx-swift: /Users/admin/builder/spi-builder-workspace
resolved source packages: swift-numerics, mlx-swift
2026-09-25 12:29:55.442 xcodebuild[565:3160] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
{
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"mlx/mlx/backend/common/binary.cpp",
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"mlx/mlx/backend/common/conv.cpp",
"mlx/mlx/backend/common/copy.cpp",
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"mlx/mlx/backend/common/erf.cpp",
"mlx/mlx/backend/common/fft.cpp",
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"mlx/mlx/backend/common/load.cpp",
"mlx/mlx/backend/common/primitives.cpp",
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"mlx/mlx/backend/common/softmax.cpp",
"mlx/mlx/backend/common/sort.cpp",
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"mlx/mlx/backend/metal/copy.cpp",
"mlx/mlx/backend/metal/device.cpp",
"mlx/mlx/backend/metal/fft.cpp",
"mlx/mlx/backend/metal/indexing.cpp",
"mlx/mlx/backend/metal/matmul.cpp",
"mlx/mlx/backend/metal/metal.cpp",
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"mlx/mlx/backend/metal/quantized.cpp",
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"mlx/mlx/graph_utils.cpp",
"mlx/mlx/io/gguf.cpp",
"mlx/mlx/io/gguf_quants.cpp",
"mlx/mlx/io/load.cpp",
"mlx/mlx/io/safetensor.cpp",
"mlx/mlx/linalg.cpp",
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{
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"name" : "mlx-swift",
"schemes" : [
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}
2026-09-25 12:30:23.639 xcodebuild[743:4473] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme mlx-swift-Package -destination platform=macOS,arch=arm64
Command line invocation:
/Applications/Xcode-27.0.0-Release.Candidate.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 mlx-swift-Package -destination platform=macOS,arch=arm64
Resolve Package Graph
Resolve Package Graph
Resolved source packages:
swift-numerics: https://github.com/apple/swift-numerics @ 1.1.1
mlx-swift: /Users/admin/builder/spi-builder-workspace
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
Compile plug-in “PrepareMetalShaders” in package “spi-builder-workspace”
[debug]: Compiling plugin to executable at /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/PluginExecutables/PrepareMetalShaders
[debug]: Using compiler /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc
[debug]: Plugin compilation output directory '/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/PluginExecutables'
[debug]: Computed hash of plugin compilation inputs: e57b7f859293142438957ccbe23340a1218967c85fc528f64f8dfc8bb0113a91
/Users/admin/builder/spi-builder-workspace/Plugins/PrepareMetalShaders/main.swift:211:14: error: type 'Command' has no member '_prebuildCommand'
209 | // a prebuild command to inject the output directory so swiftpm knows to pick it up
210 | commands.append(
211 | ._prebuildCommand(
| `- error: type 'Command' has no member '_prebuildCommand'
212 | displayName: "Install Headers",
213 | executable: .init("/bin/echo"),
2026-09-25 12:30:25.873 xcodebuild[745:4525] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
--- xcodebuild: WARNING: Using the first of multiple matching destinations:
{ platform:macOS, arch:arm64, id:bee670c37262b210741aa9997fcd4d6cf84d4dd4, name:My Mac }
{ platform:macOS, arch:arm64, variant:Mac Catalyst, id:bee670c37262b210741aa9997fcd4d6cf84d4dd4, name:My Mac }
{ platform:macOS, arch:arm64, variant:DriverKit, id:bee670c37262b210741aa9997fcd4d6cf84d4dd4, name:My Mac }
{ platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:bee670c37262b210741aa9997fcd4d6cf84d4dd4, name:My Mac }
** BUILD FAILED **
The following build commands failed:
Compile plug-in “PrepareMetalShaders” in package “spi-builder-workspace”
eyJibHVlcHJpbnRQcm92aWRlcl9wcm92aWRlckZpbGVQYXRoU3RyaW5nIjoiXC9Vc2Vyc1wvYWRtaW5cL2J1aWxkZXJcL3NwaS1idWlsZGVyLXdvcmtzcGFjZSIsInR5cGUiOnsiYmx1ZXByaW50UHJvdmlkZXIiOnt9fX0=
Building workspace mlx-swift with scheme mlx-swift-Package
(3 failures)
Command line invocation:
/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Resolved source packages:
swift-numerics: https://github.com/apple/swift-numerics @ 1.1.1
mlx-swift: /Users/admin/builder/spi-builder-workspace
resolved source packages: swift-numerics, mlx-swift
2026-09-25 12:30:30.327 xcodebuild[770:4733] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
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},
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},
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},
{
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"targets" : [
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}
},
{
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"targets" : [
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],
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}
},
{
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],
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}
},
{
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}
},
{
"name" : "GenerateGrad",
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"GenerateGrad"
],
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}
},
{
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2026-09-25 12:30:31.848 xcodebuild[779:4806] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme mlx-swift-Package -destination platform=macOS,arch=arm64
Command line invocation:
/Applications/Xcode-27.0.0-Release.Candidate.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 mlx-swift-Package -destination platform=macOS,arch=arm64
Resolve Package Graph
Resolved source packages:
swift-numerics: https://github.com/apple/swift-numerics @ 1.1.1
mlx-swift: /Users/admin/builder/spi-builder-workspace
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
Compile plug-in “PrepareMetalShaders” in package “spi-builder-workspace”
[debug]: Compiling plugin to executable at /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/PluginExecutables/PrepareMetalShaders
[debug]: Using compiler /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc
[debug]: Plugin compilation output directory '/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/PluginExecutables'
[debug]: Computed hash of plugin compilation inputs: e57b7f859293142438957ccbe23340a1218967c85fc528f64f8dfc8bb0113a91
/Users/admin/builder/spi-builder-workspace/Plugins/PrepareMetalShaders/main.swift:211:14: error: type 'Command' has no member '_prebuildCommand'
209 | // a prebuild command to inject the output directory so swiftpm knows to pick it up
210 | commands.append(
211 | ._prebuildCommand(
| `- error: type 'Command' has no member '_prebuildCommand'
212 | displayName: "Install Headers",
213 | executable: .init("/bin/echo"),
2026-09-25 12:30:33.048 xcodebuild[781:4838] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
--- xcodebuild: WARNING: Using the first of multiple matching destinations:
{ platform:macOS, arch:arm64, id:bee670c37262b210741aa9997fcd4d6cf84d4dd4, name:My Mac }
{ platform:macOS, arch:arm64, variant:Mac Catalyst, id:bee670c37262b210741aa9997fcd4d6cf84d4dd4, name:My Mac }
{ platform:macOS, arch:arm64, variant:DriverKit, id:bee670c37262b210741aa9997fcd4d6cf84d4dd4, name:My Mac }
{ platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:bee670c37262b210741aa9997fcd4d6cf84d4dd4, name:My Mac }
** BUILD FAILED **
The following build commands failed:
Compile plug-in “PrepareMetalShaders” in package “spi-builder-workspace”
eyJibHVlcHJpbnRQcm92aWRlcl9wcm92aWRlckZpbGVQYXRoU3RyaW5nIjoiXC9Vc2Vyc1wvYWRtaW5cL2J1aWxkZXJcL3NwaS1idWlsZGVyLXdvcmtzcGFjZSIsInR5cGUiOnsiYmx1ZXByaW50UHJvdmlkZXIiOnt9fX0=
Building workspace mlx-swift with scheme mlx-swift-Package
(3 failures)
BUILD FAILURE 6.4 macosXcodebuild