Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: mwc-random (user goal)
rejecting: mwc-random-0.13.3.2 (global constraint requires ==0.13.3.1)
trying: mwc-random-0.13.3.1
next goal: base (dependency of mwc-random-0.13.3.1)
rejecting: base-4.7.0.1/installed-e4b... (conflict: mwc-random => base>=4.8 &&
<5)
rejecting: base-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.