LLVM 17.0.1 has no runtimes-17.0.1.src.tar.xz

Runtimes-17.0.1.src.tar.xz is missing and cmake stops.

It was added in 17.0.2, so that’s not surprising. You can extract it yourself from the tag on GitHub or use 17.0.4 that’s just released and have many bugfixes.