Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: api-builder (user goal)
rejecting: api-builder-0.12.0.0, api-builder-0.11.0.0, api-builder-0.10.0.0,
api-builder-0.9.1.0, api-builder-0.9.0.0, api-builder-0.8.0.0,
api-builder-0.7.4.0, api-builder-0.7.3.0, api-builder-0.7.1.0,
api-builder-0.7.0.1, api-builder-0.7.0.0 (constraint from user target requires
==0.6.0.0)
trying: api-builder-0.6.0.0
next goal: base (dependency of api-builder-0.6.0.0)
rejecting: base-4.9.0.0/installed-4.9... (conflict: api-builder => base>=4.6
&& <4.8)
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.