Hello! I stumbled across this bug after re-discovering that Python bytecode is not reproducible (through "glib"). Just sharing some notes.. Nix recently made an effort to fix this. AFAICT the ".pyc" files are still a problem, but at least they got the interpreters building reproducibly: https://github.com/NixOS/nixpkgs/issues/22570 https://github.com/NixOS/nixpkgs/pull/22585 It would be great to revive this longstanding bug! *walks away slowly before anyone notices*