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, 0.1.3.3, 0.1.3.2
(global constraint requires ==0.1.3.1)
trying: numeric-prelude-0.1.3.1
trying: base-4.8.1.0/installed-4f7... (dependency of numeric-prelude-0.1.3.1)
next goal: parsec (dependency of numeric-prelude-0.1.3.1)
rejecting: parsec-3.1.9, 3.1.8, 3.1.7, 3.1.6, 3.1.5, 3.1.4, 3.1.3, 3.1.2,
3.1.1, 3.1.0, 3.0.1, 3.0.0 (conflict: numeric-prelude => parsec>=1 && <3)
rejecting: parsec-2.1.0.1, 2.1.0.0, 2.0 (conflict:
base==4.8.1.0/installed-4f7..., parsec => base<4.8)
Dependency tree exhaustively searched.