python311Packages.pytest-subtests: fix build

Checking runtime dependencies for pytest_subtests-0.11.0-py3-none-any.whl
  - attrs not installed

pkgs/development/python-modules/pytest-subtests/default.nix

@@ -1,10 +1,17 @@
 { lib
 , buildPythonPackage
 , fetchPypi
-, pytestCheckHook
 , pythonOlder
+
+# build-system
 , setuptools
 , setuptools-scm
+
+# dependencies
+, attrs
+
+# tests
+, pytestCheckHook
 }:
 
 buildPythonPackage rec {
@@ -24,6 +31,10 @@ buildPythonPackage rec {
     setuptools-scm
   ];
 
+  propagatedBuildInputs = [
+    attrs
+  ];
+
   nativeCheckInputs = [
     pytestCheckHook
   ];