diff --git a/pkgs/development/python-modules/persim/default.nix b/pkgs/development/python-modules/persim/default.nix
index b3231169d3b9..ec7df3e4daad 100644
--- a/pkgs/development/python-modules/persim/default.nix
+++ b/pkgs/development/python-modules/persim/default.nix
@@ -17,6 +17,8 @@ buildPythonPackage (finalAttrs: {
   version = "0.3.8";
   format = "setuptools";
 
+  __structuredAttrs = true;
+
   src = fetchPypi {
     inherit (finalAttrs) version;
     pname = "persim";