{ config, lib, pkgs, username, ... }:
let
  cfg = config.os.srv.nix-helper;
in
{
  options.os.srv.nix-helper.enable = lib.mkEnableOption "enables nix-helper";
  config = lib.mkIf cfg.enable {
    nix.settings = {
      trusted-users = [ "root" "${username}" ];
      experimental-features = [ "nix-command" "flakes" ];
    };

    programs.nh = {
      enable = true;
      flake = "/etc/nixos";
    };

    environment.systemPackages = with pkgs; [
      nix-output-monitor
      nvd
    ];
  };
}