until -package:numeric-prelude -package:base-prelude -package:hosc -package:numhask -package:distribution-opensuse -package:rebase -package:snap-core -package:singletons-base is:exact -package:LambdaHack package:utility-ht

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