diff --git a/pkgs/development/python-modules/versiontools/default.nix b/pkgs/development/python-modules/versiontools/default.nix
index fd4c03f8eb5a..5e99a1560e6b 100644
--- a/pkgs/development/python-modules/versiontools/default.nix
+++ b/pkgs/development/python-modules/versiontools/default.nix
@@ -6,14 +6,17 @@
   isPy3k,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "versiontools";
   version = "1.9.1";
   pyproject = true;
 
+  __structuredAttrs = true;
+
   src = fetchPypi {
-    inherit pname version;
-    sha256 = "1xhl6kl7f4srgnw6zw4lr8j2z5vmrbaa83nzn2c9r2m1hwl36sd9";
+    pname = "versiontools";
+    inherit (finalAttrs) version;
+    hash = "sha256-qWkzKIehipyYsN8OpNTKdZcvJMqU8G+4fVkTd+g0FPY=";
   };
 
   build-system = [ setuptools ];
@@ -25,4 +28,4 @@ buildPythonPackage rec {
     description = "Smart replacement for plain tuple used in __version__";
     license = lib.licenses.lgpl2;
   };
-}
+})