Resolving dependencies... cabal: Could not resolve dependencies: next goal: shaker (user goal) rejecting: shaker-0.5.1 (global constraint requires ==0.5.0) trying: shaker-0.5.0 next goal: test-framework-quickcheck2 (dependency of shaker-0.5.0) rejecting: test-framework-quickcheck2-0.3.0.3, 0.3.0.2, 0.3.0.1, 0.3.0 (conflict: shaker => test-framework-quickcheck2==0.2.*) trying: test-framework-quickcheck2-0.2.12.4 next goal: test-framework (dependency of shaker-0.5.0) rejecting: test-framework-0.8.1.1, 0.8.1.0, 0.8.0.3, 0.8.0.2, 0.8.0.1, 0.8, 0.7.0, 0.6.2, 0.6.1, 0.6, 0.5, 0.4.2.3, 0.4.2.2, 0.4.2.1, 0.4.2.0, 0.4.1.1, 0.4.1, 0.4.0 (conflict: shaker => test-framework==0.3.*) rejecting: test-framework-0.3.3, 0.3.2, 0.3.1, 0.3.0 (conflict: test-framework-quickcheck2 => test-framework>=0.6) rejecting: test-framework-0.2.4, 0.2.3, 0.2.2, 0.2.1, 0.2.0, 0.1.2, 0.1.1, 0.1 (conflict: shaker => test-framework==0.3.*) Dependency tree exhaustively searched.