until -package:numeric-prelude -package:base-prelude -package:hosc -package:numhask -package:rebase -package:util -package:ghc-lib-parser -package:distribution-opensuse -package:protolude 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