Issue is, op is trying to use matrix strategy when with cross-compiling they could avoid it. I have done it for https://github.com/anttiharju/compare-changes (which has nontrivial CI pipelines but they could be a lot simpler for op's needs)

Main issue is Rust. Writing catchy headlines about hating something may feel good, but a lot of people could avoid these pains if

- zig cc gets support for new linker flag that Rust requires https://codeberg.org/ziglang/zig/pulls/30628 - rust-lang/libc gets to 1.0 which removes iconv issues for macos https://github.com/rust-lang/libc/issues/3248