python.pkgs.trollius: use optionals instead of optional, fixes eval for neovim

FRidh · FRidh · commit 0f50d5ac1962 · 2017-11-24T20:14:28.000+01:00
Eval of neovim was broken at 40851a4#commitcomment-25817374.
diff --git a/pkgs/development/python-modules/trollius/default.nix b/pkgs/development/python-modules/trollius/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   buildInputs = [ mock ];
 
-  propagatedBuildInputs = lib.optional (isPy27 || isPyPy) [ futures ];
+  propagatedBuildInputs = lib.optionals (isPy27 || isPyPy) [ futures ];
 
   patches = [
     ./tests.patch
