diff --git a/pkgs/development/python-modules/bincopy/default.nix b/pkgs/development/python-modules/bincopy/default.nix
index 1a709200066e..2151f44bd692 100644
--- a/pkgs/development/python-modules/bincopy/default.nix
+++ b/pkgs/development/python-modules/bincopy/default.nix
@@ -13,6 +13,8 @@ buildPythonPackage (finalAttrs: {
   version = "20.1.1";
   pyproject = true;
 
+  __structuredAttrs = true;
+
   src = fetchPypi {
     inherit (finalAttrs) pname version;
     hash = "sha256-6UpJi5pKvnZwPDdyqtRm8VY7T8mAnaeWXxG8dwlAk7k=";