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A package resource bundle whose Sources phase compiles .metal files into a .metallib is treated as producing a binary, so its CodeSign task declared $(EXECUTABLE_PATH) as mutated. With an empty EXECUTABLE_NAME that path is the bare Contents/MacOS folder; declaring it mutated nullifies the product-structure MkDir that would have created it, and every SwiftPM build of such a package warns 'missing creator for mutated node: (.../Contents/MacOS)'. This affects every package depending on mlx-swift. Reproduce: a package with one C target containing a single .metal file, built with swift build --build-system swiftbuild.
aceeyz
requested review from
cmcgee1024,
daveinglis,
jakepetroules,
mhrawdon,
owenv,
rconnell9 and
rjmansfield
as code owners
September 24, 2026 21:24
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