Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: special-functors (user goal)
rejecting: special-functors-1.0.0.1 (global constraint requires ==1.0)
trying: special-functors-1.0
next goal: base (dependency of special-functors-1.0)
rejecting: base-4.7.0.1/installed-e4b... (conflict: special-functors =>
base<2)
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.