[Haskell-cafe] Best practice to target different monad transformer libraries?

I am developing the effective-aspects package, which currently depends on the mtl library. I want to develop a new version based on the "Monads, Zippers and Views" approach, developed by Schrijvers and Oliveira in ICFP'11. The question is: do I need to publish a new package, say, effective-aspects-mzv, which will be an almost duplicate of the original package? or is there another more elegant way to deal with this situations? Thanks -- Ismael