Hey #nix people, yesterday I built my first rust project with docker image with flake and you've been very helpful to help me overcome difficulties, so thank you, but there's still so many things I'm not understanding and I can't find a lot of documentation. I've found this : https://nixos.org/manual/nixpkgs/stable/ , I've also found that for the rust part : https://ryantm.github.io/nixpkgs/languages-frameworks/rust/#rust but it presents mostly specific cases examples, where do I find the exhaustive list of options? Where is the source code of this?