anchor.diff:  ENV CMAKE_VER $CMAKE_VER_MAJ$CMAKE_VER_MIN
   
   RUN wget https://cmake.org/files/v$CMAKE_VER_MAJ/cmake-$CMAKE_VER.tar.gz \
  -	&& tar xf cmake-$CMAKE_VER.tar.gz && cd cmake-$CMAKE_VER \
  -	&& ./bootstrap && make -j"$(nproc --all)" && make -j"$(nproc --all)" install \
  -	&& cd .. && rm -rf cmake-$CMAKE_VER && rm -f cmake-$CMAKE_VER.tar.gz
  +    && tar xf cmake-$CMAKE_VER.tar.gz && cd cmake-$CMAKE_VER \
  +    && ./bootstrap && make -j"$(nproc --all)" && make -j"$(nproc --all)" install \
  +    && cd .. && rm -rf cmake-$CMAKE_VER && rm -f cmake-$CMAKE_VER.tar.gz
   
   ENV CMAKE_ROOT /usr/local/share/cmake-$CMAKE_VER_MAJ
   
  
positive.code: ENV PATH $PATH:/usr/local/conda/anaconda3/bin
  
  RUN wget https://repo.continuum.io/archive/Anaconda3-$CONDA_VER-Linux-x86_64.sh \
  	&& bash Anaconda3-$CONDA_VER-Linux-x86_64.sh -b -p /usr/local/conda/anaconda3 \
  	&& rm -f Anaconda3-$CONDA_VER-Linux-x86_64.sh \
  	&& conda update -n base conda -y
  
  # Install py2 and py3 envs, and registers jupyterhub kernels
  # https://github.com/jupyter/jupyter/issues/71
  
  # install everything (except JupyterHub itself) with Python 2 and 3. Jupyter is included in Anaconda.
  RUN conda create -n py3 python=3 anaconda \
  	&& conda create -n py2 python=2 anaconda
  
  # Set PYTHON env variable to point to Python2. This will be used by PyCall.jl julia package.
  ENV PYTHON /usr/local/conda/anaconda3/envs/py2/bin/python
  
negative.code: ENV RSTUDIO_VER 1.1.456
  
  RUN wget https://download2.rstudio.org/rstudio-server-rhel-$RSTUDIO_VER-x86_64.rpm \
      && echo "2ecd9dd78d645bd79e2a4ac73da4ff84  rstudio-server-rhel-$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 \
      && yum clean all \
      && rm -f rstudio-server-rhel-$RSTUDIO_VER-x86_64.rpm && rm -f RSTUDIOMD5
  
  # Libreoffice - https://www.libreoffice.org/download/libreoffice-fresh/
  # Linux x64 rpm
  