Nix doesn't guarantee bit-for-bit reproducibility: That is, two different builds of a Nix package may not produce bit-identical output. (They probably will, bec

Nix doesn't guarantee bit-for-bit reproducibility: That is, two different builds of a Nix package may not produce bit-identical output. (They probably will, because of all the sandboxing, but nothing prevents an arbitrary package from generating random numbers at build time.) Certainly Nix makes it a lot easier to get reproducibility in practice, though.