anchor.diff:        # useful libraries...
         # MonadCatchIO-transformers # Dependency problem
         composite-base
  -      # composite-aeson
  +      composite-aeson
         servant
         servant-server
         Crypto
  
positive.code:       safe
        scotty
        shakespeare
        snap
        snap-loader-static
        snap-templates
  
negative.code:       unordered-containers
        uuid
        vector
        vinyl
        wai-websockets
        websockets
        wreq
  