Peter Simons 94662bffc6 XMonad.Util.Invisible: fix build with GHC 8.8.1
This change needs base-4.9.0.0 or later so that we can
include Control.Monad.Fail. We could jump through hoops to
support older compilers still, but it feels like it's not
worthwhile.
2019-09-21 21:03:13 +02:00
..
2019-05-07 22:32:05 +01:00