until -package:numeric-prelude -package:util -package:xmonad-contrib -package:base-compat -package:rebase -package:prelude-compat -package:snap-core -package:sparse-linear-algebra -is:exact -package:mixed-types-num is:exact package:utility-ht

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