until -package:numeric-prelude -package:base-prelude -package:hosc -package:numhask -package:yesod-paginator -package:base-compat -package:dunai -package:foundation -package:xmonad-contrib 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