Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: ghci-haskeline (user goal)
rejecting: ghci-haskeline-0.2 (global constraint requires ==0.1.1)
trying: ghci-haskeline-0.1.1
next goal: ghc (dependency of ghci-haskeline-0.1.1)
rejecting: ghc-7.8.3/installed-4df... (conflict: ghc =>
array==0.5.0.0/installed-98a..., ghci-haskeline => array>=0.1 && <0.3)
Dependency tree exhaustively searched.