Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: network-transport-zeromq (user goal)
rejecting: network-transport-zeromq-0.2.1, 0.2 (global constraint requires
==0.1.0.0)
trying: network-transport-zeromq-0.1.0.0
next goal: base (dependency of network-transport-zeromq-0.1.0.0)
rejecting: base-4.8.1.0/installed-4f7... (conflict: network-transport-zeromq
=> base>=4.6 && <4.8)
rejecting: base-4.8.1.0, 4.8.0.0, 4.7.0.2, 4.7.0.1, 4.7.0.0, 4.6.0.1, 4.6.0.0,
4.5.1.0, 4.5.0.0, 4.4.1.0, 4.4.0.0, 4.3.1.0, 4.3.0.0, 4.2.0.2, 4.2.0.1,
4.2.0.0, 4.1.0.0, 4.0.0.0, 3.0.3.2, 3.0.3.1 (global constraint requires
installed instance)
Dependency tree exhaustively searched.