Resolving dependencies... cabal: Could not resolve dependencies: [__0] trying: liveplot-0.1.0.0 (user goal) [__1] trying: mvc-1.1.6 (dependency of liveplot) [__2] next goal: async (dependency of mvc) [__2] rejecting: async-2.2.1 (conflict: mvc => async>=2.0.0 && <2.2) [__2] trying: async-2.1.1.1 [__3] next goal: base (dependency of liveplot) [__3] rejecting: base-4.11.1.0/installed-4.1... (conflict: async => base>=4.3 && <4.11) [__3] rejecting: base-4.11.1.0, base-4.11.0.0, base-4.10.1.0, base-4.10.0.0, base-4.9.1.0, base-4.9.0.0, base-4.8.2.0, base-4.8.1.0, base-4.8.0.0, base-4.7.0.2, base-4.7.0.1, base-4.7.0.0, base-4.6.0.1, base-4.6.0.0, base-4.5.1.0, base-4.5.0.0, base-4.4.1.0, base-4.4.0.0, base-4.3.1.0, base-4.3.0.0, base-4.2.0.2, base-4.2.0.1, base-4.2.0.0, base-4.1.0.0, base-4.0.0.0, base-3.0.3.2, base-3.0.3.1 (constraint from non-upgradeable package requires installed instance) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: async, base, mvc, liveplot