diff --git a/pkgs/development/python-modules/optuna/default.nix b/pkgs/development/python-modules/optuna/default.nix
index 92ebd46a86f0..86aa7a8a802b 100644
--- a/pkgs/development/python-modules/optuna/default.nix
+++ b/pkgs/development/python-modules/optuna/default.nix
@@ -45,6 +45,7 @@ buildPythonPackage (finalAttrs: {
   pname = "optuna";
   version = "4.8.0";
   pyproject = true;
+  __structuredAttrs = true;
 
   src = fetchFromGitHub {
     owner = "optuna";