Resolving dependencies... cabal: Could not resolve dependencies: next goal: magico (user goal) rejecting: magico-0.0.1.1 (global constraint requires ==0.0.1) trying: magico-0.0.1 next goal: base (dependency of magico-0.0.1) rejecting: base-4.8.1.0/installed-4f7... (conflict: magico => base>=4.5 && <4.6) 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.