until -package:numeric-prelude -package:util -package:xmonad-contrib -package:LambdaHack -package:prelude-compat -package:protolude -package:basic-prelude -package:free -package:snap-core package:utility-ht is:exact

until :: Monad m => (a -> Bool) -> m a -> m a
utility-ht Control.Monad.HT
repeat action until result fulfills condition