diff --git a/README.org b/README.org
index d6dda97..72d5d4d 100644
--- a/README.org
+++ b/README.org
@@ -112,7 +112,6 @@ RUN nix-shell /etc/dotfiles/shell.nix
 
   inputs = {
     <<os-nixpkgs>>
-    flake-utils.url = "github:numtide/flake-utils";
     <<os-home-manager>>
     <<os-emacs-overlay>>
     <<os-nixos-hardware>>
@@ -749,10 +748,11 @@ in {
 
 {
   environment.systemPackages = [
-    tiled
-    godot
-    godot-server
-    godot-headless
+    pkgs.tiled
+    pkgs.godot
+    pkgs.godot-server
+    pkgs.godot-headless
+    pkgs.python310Packages.gdtoolkit
   ];
 }
 #+END_SRC
diff --git a/flake.nix b/flake.nix
index f823780..4a81fa1 100644
--- a/flake.nix
+++ b/flake.nix
@@ -5,7 +5,6 @@
   inputs = {
     nixpkgs.url = "nixpkgs/nixos-unstable";
     nixpkgs-unstable.url = "nixpkgs/master";
-    flake-utils.url = "github:numtide/flake-utils";
     home-manager.url = "github:nix-community/home-manager";
     home-manager.inputs.nixpkgs.follows = "nixpkgs";
     emacs-overlay.url = "github:nix-community/emacs-overlay";