Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: cassy (user goal)
rejecting: cassy-0.7.1, cassy-0.6, cassy-0.5.2, cassy-0.5.1.0, cassy-0.4.0.1,
cassy-0.4, cassy-0.3.2, cassy-0.2.0.3, cassy-0.2.0.2 (constraint from user
target requires ==0.2.0.1)
trying: cassy-0.2.0.1
trying: base-4.9.0.0/installed-4.9... (dependency of cassy-0.2.0.1)
next goal: cassandra-thrift (dependency of cassy-0.2.0.1)
rejecting: cassandra-thrift-0.8.5.1, cassandra-thrift-0.8.5,
cassandra-thrift-0.8.0 (conflict: base==4.9.0.0/installed-4.9...,
cassandra-thrift => base>=4.2.0.0 && <4.9)
rejecting: cassandra-thrift-0.7.4, cassandra-thrift-0.7.2.1,
cassandra-thrift-0.7.2, cassandra-thrift-0.7.0, cassandra-thrift-0.6.6,
cassandra-thrift-0.6.5, cassandra-thrift-0.0.5, cassandra-thrift-0.0.4,
cassandra-thrift-0.0.3, cassandra-thrift-0.0.2, cassandra-thrift-0.0.1
(conflict: cassy => cassandra-thrift>=0.8)
Dependency tree exhaustively searched.