Resolving dependencies... cabal: Could not resolve dependencies: next goal: numeric-prelude (user goal) rejecting: numeric-prelude-0.4.2, 0.4.1, 0.4.0.3, 0.4.0.2, 0.4.0.1, 0.4, 0.3.0.2, 0.3.0.1, 0.3, 0.2.2.1, 0.2.2, 0.2.1, 0.2, 0.1.3.4 (global constraint requires ==0.1.3.3) trying: numeric-prelude-0.1.3.3 trying: base-4.8.1.0/installed-4f7... (dependency of numeric-prelude-0.1.3.3) trying: QuickCheck-2.8.1 (dependency of numeric-prelude-0.1.3.3) trying: containers-0.5.6.2/installed-2de... (dependency of QuickCheck-2.8.1) trying: numeric-prelude-0.1.3.3:-buildtests rejecting: numeric-prelude-0.1.3.3:+splitbase (conflict: containers => array==0.5.1.0/installed-d42..., numeric-prelude-0.1.3.3:splitbase => array>=0.1 && <0.4) rejecting: numeric-prelude-0.1.3.3:-splitbase (conflict: base==4.8.1.0/installed-4f7..., numeric-prelude-0.1.3.3:splitbase => base>=1.0 && <2) Dependency tree exhaustively searched.