templates VS mach-nix-template

Unless you want to handwire something together or use another higher level function from some 3rd party library, your want to use this function. It is basically the entrypoint to a flake based nixos system configuration. See https://github.com/NixOS/templates/blob/master/simple-container/flake.nix for an example.

There are some templates on the official repository. https://github.com/NixOS/templates You can find others on github.

Don’t forget about the official templates. Built right into the CLI https://github.com/NixOS/templates

I am new to nix, and even newer when it comes to using flakes. I was trying out the following simple flake (based on this template), which just terminates with a segmentation fault whenever I use --impure flag (e.g. nix develop --impure)

You would probably want to use flakes. There is NixOS/templates repo with flake templates. Take a look at go-hello one.

You should consider adding this as a template to https://github.com/nixos/templates.

Hi! Yes, there is a solution to your problem! I used my popular project mach-nix-template to generate a python-environment.

This happened, because you only copied the text from the flake.nix file you found here. You did not copy over the flake.lock file, which stores information about what version of nixpkgs and other dependencies your software uses. This led to an incompatibility. I am sorry, I forgot to mention that the flake.lock file needs to be present as well. I updated the readme accordingly.

Hey, I had the same issues as you. Therefore I created the following nix flake: https://github.com/Quoteme/mach-nix-template

I started with this template.