fix: eliminate configuration evaluation warnings

modules/desktop/theming.nix

@@ -32,6 +32,9 @@ in
 
       image = wallpaper;
 
+      # Regreet is not enabled, so its styling target stays off.
+      targets.regreet.enable = false;
+
       cursor = {
         package = pkgs.bibata-cursors;
         # Solid white with a dark outline, so it stays easy to spot against the

modules/nvim/nvim.nix

@@ -19,6 +19,7 @@ in
     home-manager.users.${user} = hm: {
       programs.nixvim = {
         enable = true;
+        nixpkgs.useGlobalPackages = true;
 
         extraPackages = with pkgs; [
           git # neogit and gitsigns shell out to git