fenix VS nixpkgs-mozilla

Rustup works as is. Though note that Nix supplants all such toolchain installers such as Rustup, nvm, etc. I.e. instead of Rustup there is fenix.

Fenix ( https://github.com/nix-community/fenix ) has tooling or picking a specific toolchain or even nightly. You can then build with the following nix code:

Fenix monthly is a new branch similar to the main branch, but only updated on the 1st of every month, for cases where you want to use rust nightly but don't need it to be updated very often.

The issue should be fixed once the nix-vscode-extension and fenix patches are merged. The latter will happen automatically once CI passes.

4. I would suggest Mozilla's Rust overlay or fenix or similar instead of Rustup - that would be more of the "Nix-way" to acquire the toolchain and you can still manage multiple versions. Not sure what the Ruby equivalent is, I don't do Ruby.

To follow along, you'll need a stable Rust toolchain. See the install page for instructions to install rustup for your platform. You should prefer this method to your distribution's package manager. If you're a NixOS freak, I recommend fenix.

Do I know how to do this? No, but this real-world and the wiki might be places to start. I'll eventually have to figure this out myself so if I get around to that I'll post what I learn too

Is there a way to still keep it pure? From the nixpkgs-mozilla repo:

Fenix provides the minimal, default, and complete profile of rust toolchains, latest profile of nightly toolchains, nightly version of rust analyzer and its vscode extension. It aims to be a replacement for rustup and the rust overlay provided by nixpkgs-mozilla.

Firefox-nightly is maintained in the official nixpkgs-mozilla repo, so you're incorrect on that point. It's unreasonable to ask me to pick out examples for you, just to prove that numbers have actual meaning. However, feel free to peruse recently added packages and see which ones do and don't make their way to the AUR.

4. I would suggest Mozilla's Rust overlay or fenix or similar instead of Rustup - that would be more of the "Nix-way" to acquire the toolchain and you can still manage multiple versions. Not sure what the Ruby equivalent is, I don't do Ruby.

and for building software, I'd suggest using flakes for both the software repo and the system configuration, because then you can just add the software flake as an input to the configuration flake and that's it, and you have the build code separated from your system. Using e.g. "ssh+git://git.example.com/secret-project" as the input should work, though I don't know which user's SSH keys it will try to use. I think mozilla-overlay is a good example, the flake outputs are a couple overlays you can add to your system's nixpkgs (here's how to add overlays in nixos), especially take a look at phlay-overlay in the mozilla repo, it's an overlay that adds one package so it's pretty simple. You can do something similar without using flakes though, fetching the sources needs to be done differently though, I know there's the builtins.fetchGit and builtins.fetchTarball functions, the former I assume would work similarly with SSH keys, no idea about the latter. The rest, making a derivation for building the software and adding it to your configuration's nixpkgs, should work the same.

I am on NixOS at the moment, Widevine (Nightly) on Arch was working well. I installed Nightly from https://github.com/mozilla/nixpkgs-mozilla.

Fenix provides the minimal, default, and complete profile of rust toolchains, latest profile of nightly toolchains, nightly version of rust analyzer and its vscode extension. It aims to be a replacement for rustup and the rust overlay provided by nixpkgs-mozilla.