diff --git a/pkgs/development/python-modules/nptyping/default.nix b/pkgs/development/python-modules/nptyping/default.nix
index ad055fa719d0..1038976a57b1 100644
--- a/pkgs/development/python-modules/nptyping/default.nix
+++ b/pkgs/development/python-modules/nptyping/default.nix
@@ -15,6 +15,8 @@ buildPythonPackage (finalAttrs: {
   version = "2.5.0";
   format = "setuptools";
 
+  __structuredAttrs = true;
+
   src = fetchFromGitHub {
     owner = "ramonhagenaars";
     repo = "nptyping";