Resolving dependencies... cabal: Could not resolve dependencies: next goal: cognimeta-utils (user goal) rejecting: cognimeta-utils-0.1.2, cognimeta-utils-0.1.1 (constraint from user target requires ==0.1.0) trying: cognimeta-utils-0.1.0 trying: base-4.9.0.0/installed-4.9... (dependency of cognimeta-utils-0.1.0) next goal: collections-api (dependency of cognimeta-utils-0.1.0) rejecting: collections-api-1.0.0.0 (conflict: base==4.9.0.0/installed-4.9..., collections-api => base>=3 && <4.8) Dependency tree exhaustively searched.