anchor.diff:             /usr/local/lib/python /usr/local/lib/python3.5/site-packages \
              /usr/local/lib/python3.5/dist-packages
   
  -RUN cd /src/legacypipe/py && git pull && git describe && echo 8
  +#RUN cd /src/legacypipe/py && git pull && git describe && echo 12
   
   RUN    python    -m compileall /src/legacypipe/py/{legacypipe,legacyzpts} \
       && python -O -m compileall /src/legacypipe/py/{legacypipe,legacyzpts}
  
positive.code:     && cd unwise_psf && git checkout dr8
  
  # Legacypipe
  RUN git clone http://github.com/legacysurvey/legacypipe.git legacypipe
  
  ENV PYTHONPATH /usr/local/lib/python:/src/unwise_psf/py:/src/legacypipe/py
  ENV WISE_PSF_DIR /src/unwise_psf/etc
  
negative.code:     && make extra \
      && make install INSTALL_DIR=/usr/local \
      && make clean \
      && (cd && PYTHONPATH=/usr/local/lib/python python3 -c "import astrometry; print(astrometry.__version__)")
  
  # The Tractor
  RUN git clone http://github.com/dstndstn/tractor.git tractor \
  