Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: hans (user goal)
rejecting: hans-3.0.1, hans-3.0.0.1, hans-2.6.0.0, hans-2.5.0.0, hans-2.4.0.1,
hans-2.4.0.0 (constraint from user target requires ==2.1.0.0)
trying: hans-2.1.0.0
trying: base-4.9.0.0/installed-4.9... (dependency of hans-2.1.0.0)
next goal: time (dependency of hans-2.1.0.0)
rejecting: time-1.6.0.1/installed-1.6..., time-1.7.0.1, time-1.7,
time-1.6.0.1, time-1.6, time-1.5.0.1, time-1.5, time-1.4.2, time-1.4.1,
time-1.4.0.2, time-1.4.0.1, time-1.4 (conflict: hans => time>=1.2.0.0 &&
<1.3.0.0)
rejecting: time-1.3, time-1.2.0.5, time-1.2.0.4, time-1.2.0.3, time-1.2.0.2,
time-1.2.0.1 (conflict: base==4.9.0.0/installed-4.9..., time => base>=4 &&
<4.7)
rejecting: time-1.2, time-1.1.4, time-1.1.3, time-1.1.2.4, time-1.1.2.3,
time-1.1.2.2, time-1.1.2.1, time-1.1.2.0, time-1.0 (conflict: hans =>
time>=1.2.0.0 && <1.3.0.0)
Dependency tree exhaustively searched.