8.6.1 compatabillity.

davean · davean · commit 17cbba72aa5a · 2018-10-14T17:52:18.000-04:00
diff --git a/test/QueryT.hs b/test/QueryT.hs
@@ -4,6 +4,7 @@
 {-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE RankNTypes #-}
 {-# LANGUAGE TypeFamilies #-}
+{-# LANGUAGE UndecidableInstances #-}
 
 import Control.Lens
 import Control.Monad.Fix
