Resolving dependencies... cabal: Could not resolve dependencies: next goal: eventstore (user goal) rejecting: eventstore-0.14.0.0, eventstore-0.13.1.7, eventstore-0.13.1.6, eventstore-0.13.1.5, eventstore-0.12.0.0, eventstore-0.11.0.0, eventstore-0.10.0.2, eventstore-0.10.0.1, eventstore-0.10.0.0, eventstore-0.9.1.3, eventstore-0.9.1.2, eventstore-0.9.1.1, eventstore-0.9.1.0, eventstore-0.9.0.0, eventstore-0.8.0.0, eventstore-0.7.2.1, eventstore-0.7.2.0, eventstore-0.7.1.0, eventstore-0.7.0.1, eventstore-0.7.0.0, eventstore-0.6.0.1, eventstore-0.6.0.0, eventstore-0.5.0.1, eventstore-0.5.0.0, eventstore-0.4.0.0, eventstore-0.3.1.0, eventstore-0.3.0.0, eventstore-0.2.0.1, eventstore-0.2.0.0, eventstore-0.1.2.0, eventstore-0.1.1.0, eventstore-0.1.0.1 (constraint from user target requires ==0.1.0.0) trying: eventstore-0.1.0.0 next goal: base (dependency of eventstore-0.1.0.0) rejecting: base-4.9.0.0/installed-4.9... (conflict: eventstore => base>=4.7 && <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.