Would it be possible to bump the mtl dependency to 2, or even better switch over to transformers? I can send you a patch if you'd like.
I just updated to mtl 0.2, and there is no problem. If I replace mtl with transformers, it says I should use transformers-fd or transformers-tf. In hackage, transformers-fd says it is obsolete, being replaced by mtl.
Basically, I am not 100% sure what you are requesting. If you have a patch, send it over (or just commit it on a fork), otherwise clarify. I will not put another version into hackage until I hear from you.
mtl 2 is perfect, ignore what I said about transformers.
ok, will put a new version out