Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: clock (user goal)
rejecting: clock-0.7.2, clock-0.7.1.1, clock-0.7.1, clock-0.6.0.1,
clock-0.6.0, clock-0.5.2, clock-0.5.1, clock-0.5.0.1, clock-0.5.0.0,
clock-0.4.6.0, clock-0.4.5.0, clock-0.4.4.0, clock-0.4.3.0, clock-0.4.2.0,
clock-0.4.1.3 (constraint from user target requires ==0.4.1.2)
trying: clock-0.4.1.2
next goal: base (dependency of clock-0.4.1.2)
rejecting: base-4.9.0.0/installed-4.9... (conflict: clock => base<4.6)
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.