Resolving dependencies...
cabal: Could not resolve dependencies:
trying: clash-ghc-0.6.24 (user goal)
next goal: ghc (dependency of clash-ghc-0.6.24)
rejecting: ghc-8.0.1.20160701/installed-8.0... (conflict: clash-ghc =>
ghc>=7.10.1 && <7.12)
Dependency tree exhaustively searched.