Resolving dependencies...
cabal: Could not resolve dependencies:
trying: activehs-0.3.2 (user goal)
next goal: hint (dependency of activehs-0.3.2)
rejecting: hint-0.7.0 (conflict: activehs => hint>=0.6 && <0.7)
trying: hint-0.6.0
next goal: ghc (dependency of hint-0.6.0)
rejecting: ghc-8.0.2/installed-8.0... (conflict: ghc =>
directory==1.3.0.0/installed-1.3..., activehs => directory>=1.1 && <1.3)
Dependency tree exhaustively searched.