diff --git a/pkgs/development/python-modules/demjson3/default.nix b/pkgs/development/python-modules/demjson3/default.nix
index 6a46dc56adee..6171bc3281c8 100644
--- a/pkgs/development/python-modules/demjson3/default.nix
+++ b/pkgs/development/python-modules/demjson3/default.nix
@@ -5,13 +5,13 @@
   python,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "demjson3";
   version = "3.0.6";
   format = "setuptools";
 
   src = fetchPypi {
-    inherit pname version;
+    inherit (finalAttrs) pname version;
     hash = "sha256-N8g7DG6wjSXe/IjfCipIddWKeAmpZQvW7uev2AU826w=";
   };
 
@@ -28,4 +28,4 @@ buildPythonPackage rec {
     license = lib.licenses.lgpl3Plus;
     maintainers = with lib.maintainers; [ fab ];
   };
-}
+})