anchor.diff:  # Julia dependencies
   RUN apt-get install -y julia libnettle4 && apt-get clean
   
  -# R dependencies that conda can't provide (X, fonts)
  -RUN apt-get install -y libxrender1 fonts-dejavu && apt-get clean
  +# R dependencies that conda can't provide (X, fonts, compilers)
  +RUN apt-get install -y libxrender1 fonts-dejavu gfortran gcc && apt-get clean
   
   # The Glorious Glasgow Haskell Compiler
   RUN apt-get install -y --no-install-recommends software-properties-common && apt-get clean
  
positive.code: ENV HOME /home/jovyan
  ENV SHELL /bin/bash
  ENV USER jovyan
  ENV PATH $CONDA_DIR/bin:$PATH
  WORKDIR $HOME
  
  USER jovyan
  
negative.code: RUN julia -e 'Pkg.add("Gadfly")' && julia -e 'Pkg.add("RDatasets")'
  
  # IHaskell
  RUN cabal update && \
      cabal install cpphs && \
      cabal install gtk2hs-buildtools && \
  