Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: ihaskell (user goal)
rejecting: ihaskell-0.6.3.0, 0.6.2.0, 0.6.1.0, 0.6.0.0, 0.5.0.0, 0.4.3.0,
0.4.2.0, 0.4.1.0, 0.4.0.0, 0.3.0.4, 0.3.0.3, 0.3.0.2, 0.3.0.1, 0.3.0.0 (global
constraint requires ==0.2.0.5)
trying: ihaskell-0.2.0.5
next goal: base (dependency of ihaskell-0.2.0.5)
rejecting: base-4.7.0.1/installed-e4b... (conflict: ihaskell => base==4.6.*)
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.