anchor.diff:  
   
   #-------------------------------------------------------------------------------
  -# AFNI
  -# https://afni.nimh.nih.gov/pub/dist/doc/htmldoc/background_install/install_instructs/steps_linux_ubuntu.html#install-steps-linux-ubuntu
  -#-------------------------------------------------------------------------------
  -WORKDIR $SOFT
  -RUN \
  -    wget -c $LIBXP_URL && \
  -    dpkg -i `basename $LIBXP_URL` && \
  -    apt-get install -f  && \
  -    curl -O $AFNI_URL && \
  -    ["chsh", "-s", "/usr/bin/tcsh"] && \
  -    ["tcsh", "@update.afni.binaries", "-package", "linux_openmp_64", "-do_extras"] && \
  -    ["chsh", "-s", "/bin/bash"] && \
  -    cp $HOME/abin/AFNI.afnirc $HOME/.afnirc && \
  -    echo "addpath \$HOME/abin" >> $BASHRC
  -
  -
  -#-------------------------------------------------------------------------------
   # ANTS (https://github.com/stnava/ANTs)
   #-------------------------------------------------------------------------------
   WORKDIR $SOFT
  
positive.code: # Python environment with virtualenvwrapper
  #-------------------------------------------------------------------------------
  # Install Python 3 from miniconda
  WORKDIR $SOFT
  RUN \
    wget -O miniconda.sh \
  
negative.code:   bash miniconda.sh -b -p $HOME/miniconda && \
    rm miniconda.sh && \
    echo "addpath \$HOME/miniconda/bin" >> $BASHRC && \
    conda update -y python conda && \
    conda config --add channels conda-forge && \
    conda install -y --no-deps \
  matplotlib \
  cycler \
  freetype \
  