Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] trying: sydtest-0.6.0.0 (user goal)
[__1] unknown package: autodocodec-yaml (dependency of sydtest)
[__1] fail (backjumping, conflict set: autodocodec-yaml, sydtest)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: sydtest, autodocodec-yaml