Resolving dependencies... cabal: Could not resolve dependencies: next goal: HarmTrace (user goal) rejecting: HarmTrace-2.2.0, 2.1, 2.0, 1.0, 0.7, 0.6, 0.5, 0.4, 0.3, 0.2 (global constraint requires ==0.1.1) trying: HarmTrace-0.1.1 next goal: base (dependency of HarmTrace-0.1.1) rejecting: base-4.8.1.0/installed-4f7... (conflict: HarmTrace => base>=4.2 && <4.4) rejecting: base-4.8.1.0, 4.8.0.0, 4.7.0.2, 4.7.0.1, 4.7.0.0, 4.6.0.1, 4.6.0.0, 4.5.1.0, 4.5.0.0, 4.4.1.0, 4.4.0.0, 4.3.1.0, 4.3.0.0, 4.2.0.2, 4.2.0.1, 4.2.0.0, 4.1.0.0, 4.0.0.0, 3.0.3.2, 3.0.3.1 (global constraint requires installed instance) Dependency tree exhaustively searched.