until -package:numeric-prelude -package:base-prelude -package:hosc -package:numhask -package:elerea -package:netwire -package:llvm-hs-pure -package:hledger-web -package:snap-core 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