Comments: How to add unstable channel packages and services to NixOS configuration

[fictionbecomesfact]

Comments for How to add unstable channel packages and services to NixOS configuration

[dmarcoux]

Thank you for sharing this. I went a step further to have reproducible builds and ended up pinning the unstable channel to a specific commit. This is how I've done it:

nixpkgs.config = {
  packageOverrides = pkgs: {
    unstable = import (builtins.fetchTarball {
      # Descriptive name to make the store path easier to identify
      name = "nixos-unstable-25-11-2023";
      # Find the hash of the latest commit for nixos-unstable with
      # git ls-remote https://github.com/nixos/nixpkgs nixos-unstable
      url = "https://github.com/nixos/nixpkgs/archive/19cbff58383a4ae384dea4d1d0c823d72b49d614.tar.gz";
      # Obtained using `nix-prefetch-url --unpack <url>`
      sha256 = "0dzvnjccsnc2661yks0xypj2px335k6abysm335z1yh3qfi3rd6a";
    }) {
      config = config.nixpkgs.config;
    };
  };
};

[fictionbecomesfact]

Thank you for your contribution, that is indeed a useful addition