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, 0.4.1.0, 0.4.0.0, 0.3.2.1, 0.3.2.0,
0.3.1.0, 0.3.0.2 (global constraint requires ==0.3.0.1)
trying: riak-0.3.0.1
trying: base-4.8.1.0/installed-4f7... (dependency of riak-0.3.0.1)
next goal: aeson (dependency of riak-0.3.0.1)
rejecting: aeson-0.10.0.0, 0.9.0.1, 0.9.0.0, 0.8.1.1, 0.8.1.0, 0.8.0.2,
0.7.0.6, 0.7.0.4, 0.6.2.1, 0.6.2.0, 0.6.1.0, 0.6.0.2, 0.6.0.1, 0.6.0.0,
0.5.0.0, 0.4.0.1, 0.4.0.0, 0.3.2.14, 0.3.2.13, 0.3.2.12, 0.3.2.11, 0.3.2.10,
0.3.2.9, 0.3.2.8, 0.3.2.7, 0.3.2.6, 0.3.2.5, 0.3.2.4, 0.3.2.3, 0.3.2.2,
0.3.2.1, 0.3.2.0, 0.3.1.1, 0.3.1.0, 0.3.0.0 (conflict: riak => aeson==0.2.*)
rejecting: aeson-0.2.0.0 (conflict: base==4.8.1.0/installed-4f7..., aeson =>
base>=4 && <4.4)
rejecting: aeson-0.1.0.0, 0.8.0.1, 0.8.0.0, 0.7.0.5, 0.7.0.3, 0.7.0.2,
0.7.0.1, 0.7.0.0 (conflict: riak => aeson==0.2.*)
Dependency tree exhaustively searched.