until -package:numeric-prelude -package:util -package:hedgehog -package:faktory -package:netwire -package:extra -package:basic-prelude -package:utility-ht -package:xmonad-contrib package:dunai
Similar to Yampa's delayed switching. Loses a b in case of an
exception.
Run the first
msf until the second one produces
True
from the output of the first.