Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: clash-ghc (user goal)
rejecting: clash-ghc-0.6.24, clash-ghc-0.6.23 (constraint from user target
requires ==0.6.22)
trying: clash-ghc-0.6.22
next goal: ghc (dependency of clash-ghc-0.6.22)
rejecting: ghc-8.0.1.20161018/installed-8.0... (conflict: clash-ghc =>
ghc>=7.10.1 && <7.12)
Dependency tree exhaustively searched.