diff --git a/overlay.nix b/overlay.nix
index 1a7e243..a7f294a 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -28,19 +28,23 @@ final: prev: {
     patdiff-bin = ofinal.callPackage ./pkgs/ocaml/patdiff-bin {};
   });
 
-  python312Packages = prev.python312Packages.overrideScope (pfinal: pprev: {
-    feedvalidator = pfinal.callPackage ./pkgs/python/feedvalidator {};
-    megacom = pfinal.callPackage ./pkgs/python/megacom {};
-  });
+  python312 = prev.python312.override {
+    packageOverrides = pfinal: pprev: {
+      feedvalidator = pfinal.callPackage ./pkgs/python/feedvalidator {};
+      megacom = pfinal.callPackage ./pkgs/python/megacom {};
+    };
+  };
 
   # add to top level because it has a binary
   feedvalidator = final.python312Packages.feedvalidator;
   megacom = final.python312Packages.megacom;
 
-  python311Packages = prev.python311Packages.overrideScope (pfinal: pprev: {
-    libbs = pfinal.callPackage ./pkgs/reverse-engineering/binsync/libbs.nix {};
-    binsync = pfinal.callPackage ./pkgs/reverse-engineering/binsync/binsync.nix {};
-  });
+  python311 = prev.python311.override {
+    packageOverrides = pfinal: pprev: {
+      libbs = pfinal.callPackage ./pkgs/reverse-engineering/binsync/libbs.nix {};
+      binsync = pfinal.callPackage ./pkgs/reverse-engineering/binsync/binsync.nix {};
+    };
+  };
 
   outer-wilds-text-adventure = prev.callPackage ./pkgs/games/outer-wilds-text-adventure {};
   satisfactory-dedicated-server = prev.callPackage ./pkgs/games/satisfactory-dedicated-server {};