diff --git a/package.nix b/package.nix
index d88118c..c081663 100644
--- a/package.nix
+++ b/package.nix
@@ -27,7 +27,7 @@ buildGoModule rec {
     path = lib.cleanSource ./.;
     filter =
       path: type:
-      !(type == "regular" && lib.hasSuffix ".nix" path)
+      !(type == "regular" && (lib.hasSuffix ".nix" path || lib.hasSuffix ".py" path))
       && !(type == "directory" && lib.hasSuffix "/cmd/fsu" path);
   };
   vendorHash = null;