until -package:numeric-prelude -package:util -package:xmonad-contrib -package:LambdaHack -package:distribution-opensuse -package:dimensional -package:Cabal -package:singletons-base -package:faktory -package:elerea -package:hosc package:selective
Keep running an effectful computation until it returns a
Right value, collecting the Left's using a supplied
Monoid instance.