Resolving dependencies... cabal: Could not resolve dependencies: next goal: clash-ghc (user goal) rejecting: clash-ghc-0.6, 0.5.15, 0.5.14, 0.5.13, 0.5.12, 0.5.11, 0.5.10, 0.5.9, 0.5.8, 0.5.7, 0.5.6, 0.5.5, 0.5.4, 0.5.3, 0.5.2, 0.5.1, 0.4.1, 0.4 (global constraint requires ==0.3.3) trying: clash-ghc-0.3.3 next goal: ghc (dependency of clash-ghc-0.3.3) rejecting: ghc-7.10.2/installed-a64... (conflict: clash-ghc => ghc>=7.8 && <7.10) Dependency tree exhaustively searched.