anchor.diff:  
   ######## Stage 2 ########
   FROM registry.services.nersc.gov/nersc/intel_cxx_fort_mpi_mkl_runtime
  -COPY --from=builder /usr/local /usr/local
   
   ENV PYTHON python3
   ENV PYTHON_CONFIG python3-config
  
positive.code: RUN ln -s /usr/bin/python3 /usr/bin/python
  
  # unwise_psf
  RUN cd /src \
      && git clone https://github.com/legacysurvey/unwise_psf.git \
      && cd unwise_psf && git checkout dr8
  
  # Legacypipe
  RUN cd /src \
      && 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: ENV BLAS -L${MKLROOT}/lib/intel64 -lmkl_rt -fopenmp -lpthread -limf -lsvml -ldl
  ENV CPPFLAGS -I${MKLROOT}/include
  
  RUN git clone https://github.com/astromatic/sextractor.git sourceextractor \
      && cd sourceextractor \
      && sh autogen.sh \
      && ./configure --enable-icc --enable-mkl \
  