anchor.diff:  
   # Install and configure PROJ.4
   #
  -WORKDIR /tmp
  -RUN wget https://download.osgeo.org/proj/proj-5.2.0.tar.gz && \
  +
  +RUN cd /tmp && wget https://download.osgeo.org/proj/proj-5.2.0.tar.gz && \
       wget https://download.osgeo.org/proj/proj-datumgrid-north-america-1.1.tar.gz && \
       tar xzf proj-5.2.0.tar.gz && \
       cd proj-5.2.0/nad && \
  
positive.code:     ldconfig
  
  
  # Set working directory and user
  #
  WORKDIR /opt/app-root/gwells
  
  USER 1001
  
negative.code: # External libraries required by Python GIS extensions (e.g. GeoDjango, GeoAlchemy)
  # Install and configure GEOS
  #
  
  RUN cd /tmp && wget https://download.osgeo.org/geos/geos-3.7.1.tar.bz2 && \
      tar xjf geos-3.7.1.tar.bz2 && \
      cd geos-3.7.1/ && \
      ./configure --prefix=/usr/local && \
  