anchor.diff:  # The Tractor
   RUN git clone http://github.com/dstndstn/tractor.git tractor \
       && cd tractor \
  -    && git checkout dr9.6 \
  +    && git checkout dr10.0 \
       && python3 setup-cython.py --with-ceres install --home /usr/local \
       && make version && cp tractor/version.py /usr/local/lib/python/tractor/ \
       && rm -R $(find . -name "*.o" -o -name "*.so") \
  
positive.code:     && make install INSTALL_DIR=/usr/local \
      && make clean \
      && (cd && PYTHONPATH=/usr/local/lib/python python3 -c "import astrometry; print(astrometry.__version__)") \
      && git describe && echo 0.85
  
  # Pip installs -- binary.  We need cython for the tractor.
  RUN for x in \
  
negative.code:         && git fetch dstn && git checkout handle-oom \
  	&& pip install .
  
  ENV LEGACYPIPE_DIR /src/legacypipe/py
  
  # update legacypipe
  RUN cd /src/legacypipe && git pull \   
      && git describe && echo DR9.9.0 && \
    python    -m compileall /src/legacypipe/py/{legacypipe,legacyzpts} && \
    python -O -m compileall /src/legacypipe/py/{legacypipe,legacyzpts}
  
  