until -package:numeric-prelude -package:base-prelude -package:distribution-opensuse -package:extra -is:exact -package:classy-prelude -package:dunai -package:selective is:exact -package:base-compat -package:ghc-lib-parser package:utility-ht

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