Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: HMap (user goal)
rejecting: HMap-1.2.7, HMap-1.2.6, HMap-1.2.5, HMap-1.2.4, HMap-1.2.3,
HMap-1.2.2, HMap-1.2.1, HMap-1.2.0, HMap-1.1.9, HMap-1.1.8, HMap-1.1.7,
HMap-1.1.6, HMap-1.1.5, HMap-1.1.4, HMap-1.1.3, HMap-1.1.2, HMap-1.1.1,
HMap-1.1.0, HMap-1.0.5, HMap-1.0.3, HMap-1.0.2, HMap-1.0.1, HMap-0.912,
HMap-0.902, HMap-0.901, HMap-0.91 (constraint from user target requires ==0.9)
trying: HMap-0.9
next goal: base (dependency of HMap-0.9)
rejecting: base-4.9.0.0/installed-4.9... (conflict: HMap => base>=2 && <=4)
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.