diff --git a/pkgs/development/python-modules/boolean-py/default.nix b/pkgs/development/python-modules/boolean-py/default.nix
index 92e10955d1f1..66957c8846e7 100644
--- a/pkgs/development/python-modules/boolean-py/default.nix
+++ b/pkgs/development/python-modules/boolean-py/default.nix
@@ -6,15 +6,17 @@
   pytestCheckHook,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "boolean-py";
   version = "5.0";
   pyproject = true;
 
+  __structuredAttrs = true;
+
   src = fetchFromGitHub {
     owner = "bastikr";
     repo = "boolean.py";
-    tag = "v${version}";
+    tag = "v${finalAttrs.version}";
     hash = "sha256-h5iHcdN77ZRGMJnSJLoYkRTY1TeJ3yQ1eF193HKsNqU=";
   };
 
@@ -30,4 +32,4 @@ buildPythonPackage rec {
     license = lib.licenses.bsd2;
     maintainers = [ ];
   };
-}
+})