Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: leksah (user goal)
rejecting: leksah-0.15.0.1, 0.14.4.0, 0.14.3.0, 0.14.2.0, 0.14.1.1, 0.14.1.0,
0.14.0.1, 0.14.0.0, 0.13.4.3, 0.13.4.2, 0.13.4.1, 0.13.4.0, 0.13.3.0,
0.12.1.3, 0.12.1.2, 0.12.1.0, 0.12.0.3, 0.10.0.4, 0.10.0.3, 0.10.0.1,
0.10.0.0, 0.8.0.8, 0.8.0.6, 0.8.0.4, 0.8.0.3, 0.8.0.1, 0.8, 0.6.1, 0.6.0,
0.4.4.1, 0.4.4 (global constraint requires ==0.4.3)
trying: leksah-0.4.3
next goal: ghc (dependency of leksah-0.4.3)
rejecting: ghc-7.8.3/installed-4df... (conflict: ghc =>
Cabal==1.18.1.3/installed-715..., leksah => Cabal==1.6.0.1)
Dependency tree exhaustively searched.