fix(nixos): build vendored pi independently

configs/nixos/modules/desktop/session/rofi.nix

@@ -6,7 +6,6 @@
 }:
 # rofi as the desktop launcher and dmenu-style menu frontend.
 let
-  cfg = config.modules.desktop.session.rofi; # NOLINT(let_order)
   user = config.user.name;
 
   # A session menu built on the same themed rofi, so the power actions look
@@ -26,7 +25,7 @@ in
 {
   options.modules.desktop.session.rofi.enable = lib.mkEnableOption "the rofi launcher";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.desktop.session.rofi.enable {
     home-manager.users.${user} = {
       # No theme is set here: Stylix's rofi target supplies the Nord one.
       programs.rofi = {
@@ -35,7 +34,7 @@ in
         # Application launch is the only mode, kept minimal so the prompt opens
         # as fast as rofi can read the desktop entries.
         # Icons are off: resolving one per entry is the bulk of drun's startup.
-        extraConfig = {
+        settings = {
           modi = "drun";
           show-icons = false;
         };