Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: showdown (user goal)
rejecting: showdown-0.5.3, 0.5.2, 0.5.1, 0.5 (global constraint requires
==0.1)
trying: showdown-0.1
next goal: base (dependency of showdown-0.1)
rejecting: base-4.7.0.1/installed-e4b... (conflict: showdown => base>=2 &&
<=4)
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.