Nix

{
  nix = {
    daemonCPUSchedPolicy = "idle";
    daemonIOSchedClass = "idle";
 
    gc = {
      automatic = true;
      dates = "weekly";
      options = "--delete-older-than 14d";
    };
 
    optimise = {
      automatic = true;
      dates = [ "weekly" ];
    };
 
    settings = {
      experimental-features = [
        "nix-command"
        "flakes"
      ];
      keep-outputs = true;
      keep-env-derivations = true;
      keep-derivations = true;
      trusted-users = [
        "root"
        "@wheel"
      ];
    };
  };
 
  nixpkgs.config.allowUnfree = true;
}

nixos