cleaned up

nixos/macos/darwin.nix

@@ -1,4 +1,8 @@
-{pkgs, ...}: {
+{
+  pkgs,
+  trustedUsers,
+  ...
+}: {
   # List packages installed in system profile. To search by name, run:
   # $ nix-env -qaP | grep wget
   environment.systemPackages = [pkgs.vim];
@@ -10,7 +14,7 @@
 
   # Necessary for using flakes on this system.
   nix.settings.experimental-features = "nix-command flakes";
-  nix.settings.trusted-users = ["@groups" "biscuit"];
+  nix.settings.trusted-users = trustedUsers;
 
   # Create /etc/zshrc that loads the nix-darwin environment.
   programs.zsh.enable = true; # default shell on catalina