anchor.diff:  
   # Install PyNE
   RUN cd $HOME/opt \
  -    && git clone https://github.com/pyne/pyne.git \
  +    && git clone https://github.com/kkiesling/pyne.git \
       && cd pyne \
       && TAG=$(git describe --abbrev=0 --tags) \
  -    && git checkout tags/`echo $TAG` -b `echo $TAG` \
  -    && python setup.py install --user \
  +    && git checkout origin/0.7.0-rc -b 0.7.0-rc \
  +    && python3 setup.py install --user \
                                  --moab $HOME/opt/moab \
                                  --dagmc $HOME/opt/dagmc \
                                  --clean
   
   RUN echo "export PATH=$HOME/.local/bin:\$PATH" >> ~/.bashrc \
       && echo "export LD_LIBRARY_PATH=$HOME/.local/lib:\$LD_LIBRARY_PATH" >> ~/.bashrc \
  -    && echo "alias build_pyne='python setup.py install --user -- -DMOAB_LIBRARY=\$HOME/opt/moab/lib -DMOAB_INCLUDE_DIR=\$HOME/opt/moab/include'" >> ~/.bashrc
  +    && echo "alias build_pyne='python3 setup.py install --user -- -DMOAB_LIBRARY=\$HOME/opt/moab/lib -DMOAB_INCLUDE_DIR=\$HOME/opt/moab/include'" >> ~/.bashrc
   
   ENV LD_LIBRARY_PATH $HOME/.local/lib:$LD_LIBRARY_PATH
   
  -RUN cd $HOME/opt/pyne && ./scripts/nuc_data_make
  +RUN cd $HOME/opt/pyne && python3 ./scripts/nuc_data_make
   
   RUN cd $HOME/opt/pyne/tests \
  -    && ./travis-run-tests.sh python2 \
  +    && ./travis-run-tests.sh python3 \
       && echo "PyNE build complete. PyNE can be rebuilt with the alias 'build_pyne' executed from $HOME/opt/pyne"
  
positive.code: FROM ubuntu:18.04
  
  ENV HOME /root
  
  
negative.code: 
  # upgrade pip and install python dependencies
  ENV PATH $HOME/.local/bin:$PATH
  RUN python3 -m pip install --user --upgrade pip
  RUN pip install --user numpy scipy cython nose tables matplotlib jinja2 \
                         setuptools future
  
  