until -package:numeric-prelude -package:yesod-paginator -package:prelude-compat -package:numhask -package:base -package:snap-core -package:basic-prelude -package:extra -package:llvm-hs-pure -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