diff --git a/pkgs/development/python-modules/pytest-timeout/default.nix b/pkgs/development/python-modules/pytest-timeout/default.nix
index 5833790cf92..8c59b6ee2c9 100644
--- a/pkgs/development/python-modules/pytest-timeout/default.nix
+++ b/pkgs/development/python-modules/pytest-timeout/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
     sha256 = "0xnsigs0kmpq1za0d4i522sp3f71x5bgpdh3ski0rs74yqy13cr0";
   };
 
-  propagatedBuildInputs = [ pytest ];
+  buildInputs = [ pytest ];
 
   checkInputs = [ pytestCheckHook pexpect pytestcov ];