Resolving dependencies... cabal: Could not resolve dependencies: next goal: hoe (user goal) rejecting: hoe-1.1.0, hoe-1.0.1, hoe-1.0 (constraint from user target requires ==0.2) trying: hoe-0.2 trying: base-4.9.0.0/installed-4.9... (dependency of hoe-0.2) next goal: mtl (dependency of hoe-0.2) rejecting: mtl-2.2.1, mtl-2.2.0.1, mtl-2.2, mtl-2.1.3.1, mtl-2.1.2, mtl-2.1.1, mtl-2.1, mtl-2.0.1.1, mtl-2.0.1.0, mtl-2.0.0.0 (conflict: hoe => mtl>=1.1 && <1.2) rejecting: mtl-1.1.1.1, mtl-1.1.1.0 (conflict: base==4.9.0.0/installed-4.9..., mtl => base<4.6) rejecting: mtl-1.1.0.2, mtl-1.1.0.1, mtl-1.1.0.0 (conflict: base==4.9.0.0/installed-4.9..., mtl => base<4.3) rejecting: mtl-1.0 (conflict: hoe => mtl>=1.1 && <1.2) Dependency tree exhaustively searched.