Build failing : ghc-7.10.3 : Mac osx

[ashishnegi]

Hi I am trying to build fetchIO on Mac OSX with ghc-7.10.3 and stack but found following errors :

class Monad m => Connector m c | m -> c where

The associated type ‘ConnectionData’ mentions none of the type or 
kind variables of the class ‘Connector m c’

Also, this is not available on hackage/stackage. Can you publish after fixing ?