Resolving dependencies... cabal: Could not resolve dependencies: trying: base-4.9.0.0/installed-4.9... (dependency of kan-extensions-2.0.0.2) next goal: adjunctions (dependency of kan-extensions-2.0.0.2) rejecting: adjunctions-4.3, adjunctions-4.2.2, adjunctions-4.2.1, adjunctions-4.2, adjunctions-4.1.0.1, adjunctions-4.0.3, adjunctions-4.0.2, adjunctions-4.0.1, adjunctions-4.0, adjunctions-3.2.1.1, adjunctions-3.2.1, adjunctions-3.2, adjunctions-3.1, adjunctions-3.0.1, adjunctions-3.0.0.1, adjunctions-3.0, adjunctions-2.5, adjunctions-2.4.0.2, adjunctions-2.4.0.1, adjunctions-2.4, adjunctions-2.2.1.1, adjunctions-2.2.1, adjunctions-2.2 (conflict: kan-extensions => adjunctions>=2.0 && <2.1) rejecting: adjunctions-2.0.5 (conflict: representable-functors==2.0.2, adjunctions => representable-functors>=2.1.2 && <2.2) rejecting: adjunctions-2.0.4 (conflict: representable-functors==2.0.2, adjunctions => representable-functors>=2.1 && <2.2) trying: adjunctions-2.0.3 next goal: void (dependency of adjunctions-2.0.3) rejecting: void-0.7.1, void-0.7, void-0.6.1, void-0.6 (conflict: adjunctions => void>=0.5.4.3 && <0.6) rejecting: void-0.5.12, void-0.5.11, void-0.5.10, void-0.5.8, void-0.5.7, void-0.5.6, void-0.5.5.1, void-0.5.5, void-0.5.4.3 (conflict: base==4.9.0.0/installed-4.9..., void => base>=3 && <4.8) rejecting: void-0.5.4.2, void-0.5.4.1, void-0.5.4, void-0.5.3, void-0.5.2, void-0.5.1, void-0.5.0, void-0.4, void-0.3, void-0.2, void-0.1 (conflict: adjunctions => void>=0.5.4.3 && <0.6) Dependency tree exhaustively searched.