skip checkup --native Failure

[alldritt]

I'm trying to get started with Skip and I'm running into this problem with the skip checkup --native command.

mall@mark eegview-skip % skip checkup --native
[✓] Skip version 1.6.20 (= 1.6.20)
[✓] macOS version 15.6.1 (> 13.5.0)
[✓] macOS architecture: ARM
[✓] Swift version 6.2 (> 5.9.0)
[✓] Swift Android SDK version 6.1.0 (= 6.1.0)
[✓] Xcode version 26.0 (> 15.0.0)
[✓] Xcode tools SDKs: 5
[✓] Homebrew version 4.6.11 (> 4.1.0)
[✓] Gradle version 8.13 (> 8.6.0)
[✓] Java version 23.0.2 (> 21.0.0)
[✓] Android Debug Bridge version 1.0.41 (> 1.0.40)
[✓] Android Studio version: 2020.3
[✓] Android tools SDKs: 7
[✓] Skip license: eval good through Oct 19, 2025
[✓] Resolve dependencies (11.12s)
[✓] Build hello-skip (22.59s)
[✓] Check project schemes (5.05s)
[✓] Archive iOS ipa (19.94s)
[✓] Assemble HelloSkip-debug.ipa 3 MB
[✓] Verifying HelloSkip-debug.ipa: 3 MB
[✗] Assembling Android apk (51.58s)
[✗] error: build planning stopped due to build-tool plugin failures
Error: Error terminated(code: 1) running command: /Users/mall/Library/Developer/Toolchains/swift-6.1-RELEASE.xctoolchain/usr/bin/swift build --swift-sdk aarch64-unknown-linux-android28 --package-path /private/var/folders/tl/fjlkgtxd3cvcbctfshqbxvvw0000gn/T/C73B80BE-F0EB-473E-98D8-F1652FAF527C/.build/plugins/outputs/c73b80be-f0eb-473e-98d8-f1652faf527c/HelloSkip/destination/skipstone/HelloSkip/src/main/swift --scratch-path /private/var/folders/tl/fjlkgtxd3cvcbctfshqbxvvw0000gn/T/C73B80BE-F0EB-473E-98D8-F1652FAF527C/.build/Android/HelloSkip/swift --configuration debug -Xswiftc -DSKIP_BRIDGE -Xswiftc -DTARGET_OS_ANDROID -Xswiftc -Xfrontend -Xswiftc -no-clang-module-breadcrumbs -Xswiftc -Xfrontend -Xswiftc -module-cache-path -Xswiftc -Xfrontend -Xswiftc /private/var/folders/tl/fjlkgtxd3cvcbctfshqbxvvw0000gn/T/C73B80BE-F0EB-473E-98D8-F1652FAF527C/.build/Android/HelloSkip/swift/module-cache/HelloSkip -Xswiftc -DSKIP_BRIDGE -Xswiftc -DTARGET_OS_ANDROID -Xcc -fPIC --product HelloSkip
error: build planning stopped due to build-tool plugin failures
Error: Error terminated(code: 1) running command: /Users/mall/Library/Developer/Toolchains/swift-6.1-RELEASE.xctoolchain/usr/bin/swift build --swift-sdk aarch64-unknown-linux-android28 --package-path /private/var/folders/tl/fjlkgtxd3cvcbctfshqbxvvw0000gn/T/C73B80BE-F0EB-473E-98D8-F1652FAF527C/.build/plugins/outputs/c73b80be-f0eb-473e-98d8-f1652faf527c/HelloSkip/destination/skipstone/HelloSkip/src/main/swift --scratch-path /private/var/folders/tl/fjlkgtxd3cvcbctfshqbxvvw0000gn/T/C73B80BE-F0EB-473E-98D8-F1652FAF527C/.build/plugins/outputs/c73b80be-f0eb-473e-98d8-f1652faf527c/HelloSkip/destination/skipstone/HelloSkip/build/swift --configuration debug -Xswiftc -DSKIP_BRIDGE -Xswiftc -DTARGET_OS_ANDROID -Xswiftc -Xfrontend -Xswiftc -no-clang-module-breadcrumbs -Xswiftc -Xfrontend -Xswiftc -module-cache-path -Xswiftc -Xfrontend -Xswiftc /private/var/folders/tl/fjlkgtxd3cvcbctfshqbxvvw0000gn/T/C73B80BE-F0EB-473E-98D8-F1652FAF527C/.build/plugins/outputs/c73b80be-f0eb-473e-98d8-f1652faf527c/HelloSkip/destination/skipstone/HelloSkip/build/swift/module-cache/HelloSkip -Xswiftc -DSKIP_BRIDGE -Xswiftc -DTARGET_OS_ANDROID -Xcc -fPIC --product HelloSkip
[✗] Skip 1.6.20 checkup failed with 2 errors
See https://skip.tools/docs/faq and https://community.skip.tools for help
See output log for error details: /tmp/skip-checkup-2025-09-19T20:36:46Z.txt
Error: 3 errors

I'm running macOS 15.6.1 (24G90) on a 2021 MacBook Pro with Xcode 15.6.1 (24G90).

I've failed to find anything related to this error in the Skip FAQ and Google isn't being helpful. I would appreciate any suggestions on how to resolve this problem.

skip-checkup-2025-09-19T20:36:46Z.txt

[marcprux]

[✓] Swift Android SDK version 6.1.0 (= 6.1.0)

That should be "6.2.0" rather than "6.1.0". Can you upgrade Skip to 1.6.20 (with skip upgrade) and then install the newer Android SDK (with skip android sdk install) and then try again?

The problem is that Xcode 26 breaks Swift 6.1 SDKs (which is reported at swiftlang/swift#84379 and discussed at https://github.com/orgs/skiptools/discussions/445). If you still get errors after upgrading, please let us know.

[alldritt]

Thank you, this resolved the build issues and I'm up and running.