anchor.diff:        # useful libraries...
         # MonadCatchIO-transformers # Dependency problem
         Crypto
  +      HaXml
         MonadRandom
         Unixutils
         array
  
positive.code:       regex-posix
        regex-tdfa
        shakespeare
        split
        snap
        snap-loader-static
        snap-loader-dynamic
        snap-templates
        text
        time
        transformers
        turtle
        unordered-containers
        vector
      ]);
  
      myPythonEnv = self.myEnvFun {
  
negative.code:       hsexif
        hspec
        hspec-core
        hxt
        io-streams
        lens
        mtl
  