If machine role is personal set de.enable = true; automatically

common/default.nix

@@ -98,4 +98,9 @@
 
   security.acme.acceptTerms = true;
   security.acme.defaults.email = "zuckerberg@neet.dev";
+
+  # Enable Desktop Environment if this is a PC (machine role is "personal")
+  de.enable = (
+    builtins.elem config.networking.hostName config.machines.roles.personal
+  );
 }

common/pc/touchpad.nix

@@ -1,13 +1,9 @@
 { lib, config, pkgs, ... }:
 
 let
-  cfg = config.de.touchpad;
+  cfg = config.de;
 in
 {
-  options.de.touchpad = {
-    enable = lib.mkEnableOption "enable touchpad";
-  };
-
   config = lib.mkIf cfg.enable {
     services.libinput.enable = true;
     services.libinput.touchpad.naturalScrolling = true;