anchor.diff:      && cd unwise_psf && git checkout dr8
   
   # Legacypipe
  -RUN git clone http://github.com/legacysurvey/legacypipe.git legacypipe
  +RUN git clone http://github.com/legacysurvey/legacypipe.git legacypipe && echo 1
   
   ENV PYTHONPATH /usr/local/lib/python:/src/unwise_psf/py:/src/legacypipe/py
   ENV WISE_PSF_DIR /src/unwise_psf/etc
  
positive.code:     && make \
      && make ceres \
      && make install INSTALL_DIR=/usr/local \
      && rm -R $(find . -name "*.o" -o -name "*.so")
  
  ######## Stage 2 ########
  FROM registry.services.nersc.gov/nersc/intel_cxx_fort_mpi_mkl_runtime
  
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 \
  