@AVincentInSpace Hmm... I think nix strips them by default and you have to disable it, at least that's how it behaves here.

One other source of the discrepancy might be a feature unification or lack of it in crate2nix. But I would expect this will make the resulting binary bigger, not smaller.

Are you linking in any external libraries? This can be a source of the difference. I'd run `cargo build -vvv` or something similar and compare all the rustc invocations, possibly with a script.