{
  pkgs,
  ...
}: {

   nixpkgs = {
    config = {
      allowUnfree = true;
      permittedInsecurePackages = [
      "qtwebkit-5.212.0-alpha4"
      "electron-12.2.3"
      ];
    };
  };

   nix = {
     package = pkgs.nixFlakes;
     extraOptions = ''
      experimental-features = nix-command flakes
      warn-dirty = false
      ''; 
    gc = {
      automatic = true;
      dates = "weekly";
      options = "--delete-older-than 7d";
    };
     settings = {
      auto-optimise-store = true;
      builders-use-substitutes = true;
      keep-derivations = true;
      keep-outputs = true;
      substituters = [
      "https://hyprland.cachix.org"
      "https://cache.nixos.org"
      ];
      trusted-public-keys = [
      "hyprland.cachix.org-1:a7pgxzMz7+chwVL3/pzj6jIBMioiJM7ypFP8PwtkuGc="
      "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
      ];
     };
   };    
}