until -package:numeric-prelude -package:base-prelude -package:distribution-opensuse -package:Cabal -package:singletons-base -package:numhask -package:LambdaHack is:exact -package:llvm-hs-pure package:utility-ht

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