diff --git a/pkgs/development/python-modules/pytest-forked/default.nix b/pkgs/development/python-modules/pytest-forked/default.nix
index 855e1fb470c2..0cfb8cd6afc8 100644
--- a/pkgs/development/python-modules/pytest-forked/default.nix
+++ b/pkgs/development/python-modules/pytest-forked/default.nix
@@ -18,7 +18,13 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [ setuptools_scm ];
 
-  propagatedBuildInputs = [ py pytest ];
+  buildInputs = [
+    pytest
+  ];
+
+  propagatedBuildInputs = [
+    py
+  ];
 
   checkInputs = [ pytestCheckHook ];