Missing instances for Eq1 (Const a), Ord1 (Const a), Show1 (Const a), Ord1 (Const a)

I was looking at switching a chunk of my code over from prelude-extras to transformers 0.5, but the classes in http://hackage.haskell.org/package/transformers-0.4.2.0/docs/Data-Functor-Cl... are currently missing instances for Control.Applicative.Const. =/ -Edward