Resolving dependencies... cabal: Could not resolve dependencies: next goal: cloud-haskell (user goal) rejecting: cloud-haskell-0.3.0.0 (constraint from user target requires ==0.2.0.0) trying: cloud-haskell-0.2.0.0 next goal: distributed-process-async (dependency of cloud-haskell-0.2.0.0) rejecting: distributed-process-async-0.2.3, distributed-process-async-0.2.2, distributed-process-async-0.2.1, distributed-process-async-0.2.0, distributed-process-async-0.1.0 (conflict: cloud-haskell => distributed-process-async>=0.2.0 && <0.2) Dependency tree exhaustively searched.