Resolving dependencies... cabal: Could not resolve dependencies: next goal: synthesizer-core (user goal) rejecting: synthesizer-core-0.7.1, 0.7.0.2, 0.7.0.1, 0.7 (global constraint requires ==0.6) trying: synthesizer-core-0.6 trying: base-4.7.0.1/installed-e4b... (dependency of synthesizer-core-0.6) next goal: array (dependency of synthesizer-core-0.6) rejecting: array-0.5.0.0/installed-98a..., 0.5.1.0, 0.5.0.0 (conflict: synthesizer-core => array>=0.1 && <0.5) rejecting: array-0.4.0.1 (conflict: base==4.7.0.1/installed-e4b..., array => base>=4.2 && <4.7) rejecting: array-0.4.0.0 (conflict: base==4.7.0.1/installed-e4b..., array => base>=4.2 && <4.6) rejecting: array-0.3.0.3 (conflict: base==4.7.0.1/installed-e4b..., array => base>=4.2 && <4.5) rejecting: array-0.3.0.2, 0.3.0.1 (conflict: base==4.7.0.1/installed-e4b..., array => base>=4.2 && <4.4) rejecting: array-0.3.0.0 (conflict: base==4.7.0.1/installed-e4b..., array => base>=3 && <4.4) rejecting: array-0.2.0.0, 0.1.0.0 (conflict: base==4.7.0.1/installed-e4b..., array => base<4.3) Dependency tree exhaustively searched.