diff --git a/pkgs/development/python-modules/timelib/default.nix b/pkgs/development/python-modules/timelib/default.nix
index 9c7bd101aa3a..cd96b0226aba 100644
--- a/pkgs/development/python-modules/timelib/default.nix
+++ b/pkgs/development/python-modules/timelib/default.nix
@@ -18,9 +18,10 @@ buildPythonPackage (finalAttrs: {
     hash = "sha256-0bInBlVxhuYFjaiLoPhYN0AbKuneFX9ZNT3JeNglGHo=";
   };
 
-  build-system = [ setuptools ];
-
-  nativeBuildInputs = [ cython ];
+  build-system = [
+    cython
+    setuptools
+  ];
 
   pythonImportsCheck = [ "timelib" ];