> Note that this issue isn't macOS specific: you will get the same failure when cross-compiling targeting Linux. e.g. --build=x86_64-unknown-linux-gnu --host=i686-unknown-linux-gnu.

Can you be more specific? This particular issue isn't about cross-compiling. It's just about building for macOS on macOS. Under what circumstances is there a problem when trying to build one of the supported cross-compilation targets and does this proposed change fix that problem or create a new problem?