diff --git a/pkgs/development/python-modules/g2pkk/default.nix b/pkgs/development/python-modules/g2pkk/default.nix
index c1b5d2992097..062da14720dd 100644
--- a/pkgs/development/python-modules/g2pkk/default.nix
+++ b/pkgs/development/python-modules/g2pkk/default.nix
@@ -11,6 +11,8 @@ buildPythonPackage (finalAttrs: {
   version = "0.1.2";
   format = "setuptools";
 
+  __structuredAttrs = true;
+
   src = fetchPypi {
     inherit (finalAttrs) pname version;
     hash = "sha256-YarV1Btn1x3Sm4Vw/JDSyJy3ZJMXAQHZJJJklSG0R+Q=";