anchor.diff:  RUN \
       mkdir ants && \
       cd ants && \
  -    git clone $ANTS_GIT -b $ANTS_VERSION && \
  +    git clone $ANTS_GIT -b $ANTS_VERSION ANTs && \
  +    cd ANTs && \
       git am --signoff < /root/patches/ANTs/0001-fix-ifstream-error.patch && \
  +    cd .. && \
       mkdir build && \
       cd build && \
       cmake -DUSE_VTK=ON \
  
positive.code:     echo "VIRTUALENVWRAPPER_PYTHON=`which python3`" >> $BASHRC && \
      echo "source /usr/local/bin/virtualenvwrapper.sh" >> $BASHRC && \
      echo "export WORKON_HOME=$HOME/pyenvs" >> $BASHRC && \
      echo "workon pytre" >> $BASHRC
  
  #-------------------------------------------------------------------------------
  # source .bashrc
  
negative.code: ENV PETPVC_GIT https://github.com/UCL/PETPVC.git
  ENV CAMINO_GIT git://git.code.sf.net/p/camino/code
  ENV ANTS_GIT https://github.com/stnava/ANTs.git
  ENV PYENV_NAME pytre
  
  # Install.
  RUN \
  