It doesn't make a difference, even if you look at that particular crate itself. Every time you build version X of that crate, you will build the same Rust code.

It doesn't make a difference, even if you look at that particular crate itself. Every time you build version X of that crate, you will build the same Rust code. Cargo actually gets this part right. (Of course it doesn't mean building the same Rust code gives you the same binary every time - that's a separate problem) Sure, _updating_ the crate might be a nightmare if the generation part is not stable - but that's unrelated to reproducibility.