fenix VS nixos-flake-example

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.

There are some technical objections to the design of flakes, but the controversy in the community is primarily social imo.

The reading I'd recommend as someone sympathetic to both 'sides' isn't really a technical comparison, but this: https://grahamc.com/blog/flakes-are-an-obviously-good-thing

As far as technical pros and cons, it's worth looking at colemickens' PoC demonstrating that in principle, you can use Nix to generate literally identical output with and without flakes: https://github.com/colemickens/nixos-flake-example

My limited knowledge of flakes for my system comes mostly from https://github.com/colemickens/nixos-flake-example/