Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: riak (user goal)
rejecting: riak-0.9.0.0, 0.8.0.0, 0.7.2.1, 0.7.2.0, 0.7.0.3, 0.7.0.2, 0.7.0.1,
0.6.0.1, 0.6.0.0, 0.5.0.0, 0.4.1.1 (global constraint requires ==0.4.1.0)
trying: riak-0.4.1.0
trying: base-4.8.1.0/installed-4f7... (dependency of riak-0.4.1.0)
trying: riak-protobuf-0.20.0.0 (dependency of riak-0.4.1.0)
trying: parsec-3.1.9 (dependency of riak-protobuf-0.20.0.0)
trying: mtl-2.2.1 (dependency of parsec-3.1.9)
trying: transformers-0.4.2.0/installed-21d... (dependency of mtl-2.2.1)
next goal: pool (dependency of riak-0.4.1.0)
rejecting: pool-0.1.2.1, 0.1.2 (conflict: base==4.8.1.0/installed-4f7..., pool
=> base>=4 && <4.7)
rejecting: pool-0.1.1, 0.1.0.4, 0.1.0.3, 0.1.0.2 (conflict:
transformers==0.4.2.0/installed-21d..., pool => transformers>=0.2.1 && <0.3)
rejecting: pool-0.1.0.1, 0.1.0, 0.0.1.1, 0.0.1, 0.0.0 (conflict: riak =>
pool>=0.1.0.2)
Dependency tree exhaustively searched.