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