diff --git a/flake.nix b/flake.nix
index 3bef55a..6a5a552 100644
--- a/flake.nix
+++ b/flake.nix
@@ -36,12 +36,10 @@
 
         noise-c = final.callPackage ./packages/noise-c { };
 
-        python3Packages = prev.python3Packages.override {
-          overrides = final': prev': {
-            preserves = final'.callPackage ./packages/preserves-py { };
-            syndicate = final'.callPackage ./packages/syndicate-py { };
-          };
-        };
+        python3Packages = prev.python3Packages.overrideScope (final': prev': {
+          preserves = final'.callPackage ./packages/preserves-py { };
+          syndicate = final'.callPackage ./packages/syndicate-py { };
+        });
 
         preserves-tools =
           final.callPackage ./packages/preserves-tools { rust = rust'; };