SPM Build for Android fails with --build-system swiftbuild: module not found due to target triple mismatch

[NikolayJuly]

When building a Swift package for Android using --build-system swiftbuild, the build fails because the Android API level is stripped from the target triple during module lookup.

The compiler searches for a module targeting aarch64-unknown-linux-android but only finds one compiled for aarch64-unknown-linux-android28.0.0. The default build system handles this correctly.

Reproduction

Works (default build system):

swiftly run swift build --product LoggingExtensionDynamic --swift-sdk aarch64-unknown-linux-android28 +main-snapshot-2026-03-02

Fails (swiftbuild):

swiftly run swift build --product LoggingExtensionDynamic --swift-sdk aarch64-unknown-linux-android28 --build-system swiftbuild +main-snapshot-2026-03-02

Error

could not find module 'Logging' for target 'aarch64-unknown-linux-android';
found: aarch64-unknown-linux-android28.0.0

Full verbose output: ErrorOutput.txt

Sample package

Minimal reproduction with 1 target and 1 file: FoundationExtension.zip

Environment

Reproduced on both configurations:

	Toolchain	Android SDK	API level
1	Swift 6.2.3 (swift-6.2.3-RELEASE), arm64-apple-macosx15.0	finagolfin/swift-android-sdk	24
2	Swift 6.3-dev (LLVM c483661d4d6aac5, Swift 34b17dd3e44b2a6), arm64-apple-macosx26.0, +assertions	Official swift.org nightly (main-snapshot-2026-03-02)	28

[jakepetroules]

#1143 needs to land to get this working, as well as the changes listed in swiftlang/swift-package-manager#9756 (comment)

[NikolayJuly]

@jakepetroules Thank you a lot. I did subscribe for both of them, and will test as soon as I see nightly snapshot with those fixes. I assume issue can be open till then for others, who might hit the same issue.