anchor.diff:  
   # llvm needs CMake 2.8.12.2 or higher
   # https://cmake.org/download/
  -ENV CMAKE_VER_MAJ 3.12
  +ENV CMAKE_VER_MAJ 3.13
   ENV CMAKE_VER_MIN .2
   ENV CMAKE_VER $CMAKE_VER_MAJ$CMAKE_VER_MIN
   
  
positive.code: 
  # Anaconda
  # https://repo.continuum.io/archive
  ENV CONDA_VER 5.3.0
  
  ENV PATH $PATH:/usr/local/conda/anaconda3/bin
  
  
negative.code: RUN echo 'options(repos = c(CRAN="https://ftp.osuosl.org/pub/cran/"))' >> /usr/lib64/R/library/base/R/Rprofile
  
  # RStudio - https://www.rstudio.com/products/rstudio/download-server/
  ENV RSTUDIO_VER 1.1.463
  
  RUN wget https://download2.rstudio.org/rstudio-server-rhel-$RSTUDIO_VER-x86_64.rpm \
      && echo "4d00252fcf7f843fe4fcb00d753133b9  rstudio-server-rhel-$RSTUDIO_VER-x86_64.rpm" > RSTUDIOMD5 \
      && RESULT=$(md5sum -c RSTUDIOMD5) \
      && echo ${RESULT} > ~/check-rstudio-md5.txt \
      && yum -y install --nogpgcheck rstudio-server-rhel-$RSTUDIO_VER-x86_64.rpm \
  