flake parts

dev/overlays.nix

@@ -1,6 +1,17 @@
-{ inputs, ... }: {
+{ self, inputs, ... }: {
 
     flake.overlays.glfw-old = (final: prev: let
         pkgs-old = import inputs.nixpkgs-old { system = prev.stdenv.hostPlatform.system; };
     in { glfw = pkgs-old.glfw; });
+    
+    perSystem = { lib, system, pkgs, ... }: {
+        _module.args.pkgs = import inputs.nixpkgs {
+            inherit system;
+            overlays = [
+                self.overlays.glfw-old
+            ];
+
+            config = {};
+        };
+    };
 }