try new style

flake.nix

@@ -3,9 +3,5 @@
 
   inputs = { };
 
-  outputs =
+  outputs = _: { pkgs }: import ./lib.nix { inherit pkgs; };
-    { ... }:
-    {
-      mkLib = pkgs: import ./lib.nix { inherit pkgs; };
-    };
 }