Resolving dependencies... cabal: Could not resolve dependencies: trying: clash-vhdl-0.5.3 (user goal) trying: base-4.7.0.1/installed-e4b... (dependency of clash-vhdl-0.5.3) next goal: clash-prelude (dependency of clash-vhdl-0.5.3) rejecting: clash-prelude-0.7.3, 0.7.2 (conflict: base==4.7.0.1/installed-e4b..., clash-prelude => base>=4.8.0.0 && <5) rejecting: clash-prelude-0.7.1, 0.7, 0.6.0.1, 0.6, 0.5.1, 0.5.0.1, 0.5, 0.4, 0.3, 0.2 (conflict: clash-vhdl => clash-prelude>=0.7.2) Dependency tree exhaustively searched.