Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: antagonist (user goal)
rejecting: antagonist-0.1.0.30, antagonist-0.1.0.29, antagonist-0.1.0.27,
antagonist-0.1.0.26, antagonist-0.1.0.25, antagonist-0.1.0.24,
antagonist-0.1.0.23, antagonist-0.1.0.22, antagonist-0.1.0.19 (constraint from
user target requires ==0.1.0.18)
trying: antagonist-0.1.0.18
next goal: base (dependency of antagonist-0.1.0.18)
rejecting: base-4.9.0.0/installed-4.9... (conflict: antagonist => base>=4.6 &&
<4.7)
rejecting: base-4.9.0.0, base-4.8.2.0, base-4.8.1.0, base-4.8.0.0,
base-4.7.0.2, base-4.7.0.1, base-4.7.0.0, base-4.6.0.1, base-4.6.0.0,
base-4.5.1.0, base-4.5.0.0, base-4.4.1.0, base-4.4.0.0, base-4.3.1.0,
base-4.3.0.0, base-4.2.0.2, base-4.2.0.1, base-4.2.0.0, base-4.1.0.0,
base-4.0.0.0, base-3.0.3.2, base-3.0.3.1 (constraint from non-upgradeable
package requires installed instance)
Dependency tree exhaustively searched.