thanks you both!
yes, my list had double packages (I'm pretty sure nmu will disregard duplicated lines),
and most important, some binNMUs on armhf scheduled after 11 of septembers were already good, because they picked up the "good" ghc and didn't depend on anything that picked up the bad one.
But that said, all the haskell binNMUs will take a couple of hours, and have low priority, so they won't hurt too much :)
G.