and add it back

flake.nix

@@ -1,19 +1,24 @@
 {
-  outputs = { self }: {
+  inputs = {
+    nixpkgs.url = "nixpkgs/nixos-unstable";
+  };
+
+  outputs = { self, nixpkgs }: {
     lib = rec {
       currentDefaultPackage = flake: system: flake.defaultPackage.${system};
-      # makeDefaultPackageOverrides =
-      #   flakes: inputs: system:
-      #   let
-      #     body = (builtins.listToAttrs (builtins.map
-      #     (name: {
-      #       name = name;
-      #       value = (currentDefaultPackage flake system);
-      #     })
-      #     flakes));
-      #   in (self: super:
-      #     body
-      #   );
+      makeDefaultPackageOverrides =
+          (flakes: system:
+        let
+          body = (nixpkgs.lib.attrsets.mapAttrs'
+            (name: flake:
+              {
+              name = nixpkgs.lib.strings.toLower name;
+              value = (currentDefaultPackage flake system);
+              })
+            flakes);
+        in (self: super:
+          body
+        ));
     };
   };
 }