diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index b6371114be6..df27eb0221f 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -28828,7 +28828,7 @@ in modules // {
 
     propagatedBuildInputs = with self; [ msgpack ]
       ++ optional (!isPyPy) greenlet
-      ++ optional (!isPy34) trollius;
+      ++ optional (pythonOlder "3.4") trollius;
 
     meta = {
       description = "Python client for Neovim";