fix build dependencies

flake.nix

@@ -19,15 +19,17 @@
       # Set the source to your local dwl directory
       src = ./.;
 
+      nativeBuildInputs = with pkgs; [
+        pkg-config
+        wayland # Provides the 'wayland-scanner' tool
+      ];
       # Add the necessary build dependencies for dwl
       buildInputs = with pkgs; [
         xwayland
         libxkbcommon
-        wayland
         wayland-protocols
         wlroots
         xorg.libxcb
-        pkg-config
       ];
 
       # The build and installation process