{
  config,
  lib,
  pkgs,
  ...
}:
let
  cfg = config.my_nix;
  inherit (lib) mkEnableOption mkIf mkOption;
  types = lib.types;
in
{
  options.my_nix = {
    enable = mkEnableOption "Custom nix options";
  };

  config = mkIf cfg.enable {
    environment.systemPackages = [ pkgs.cachix ];
    nix = {
      optimise = {
        automatic = true;
      };
      settings = {
        experimental-features = [
          "nix-command"
          "flakes"
        ];
        substituters = [
          "https://nix-community.cachix.org"
          "https://cache.nixos.org"
        ];
        trusted-public-keys = [
          "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
          "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
        ];
      };
    };
    nixpkgs.config = {
      allowUnfree = true;
    };
  };
}