Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: zeromq4-haskell (user goal)
rejecting: zeromq4-haskell-0.6.3, 0.6.2, 0.6.1, 0.6, 0.5.1, 0.5, 0.4.1, 0.4
(global constraint requires ==0.3.2)
trying: zeromq4-haskell-0.3.2
trying: transformers-0.4.2.0/installed-21d... (dependency of
zeromq4-haskell-0.3.2)
next goal: exceptions (dependency of zeromq4-haskell-0.3.2)
rejecting: exceptions-0.8.0.2, 0.8.0.1, 0.8, 0.7, 0.6.1, 0.6, 0.5, 0.4
(conflict: zeromq4-haskell => exceptions==0.3.*)
rejecting: exceptions-0.3.3.1, 0.3.3, 0.3.2, 0.3.1, 0.3 (conflict:
transformers==0.4.2.0/installed-21d..., exceptions => transformers>=0.2 &&
<0.4)
rejecting: exceptions-0.2, 0.1.1, 0.1.0.1, 0.1 (conflict: zeromq4-haskell =>
exceptions==0.3.*)
Dependency tree exhaustively searched.