anchor.diff:  # Install and configure GDAL
   # (without SFCGAL as we aren't using "CREATE EXTENSION postgis_sfcgal;")
   #
  -WORKDIR /tmp
  -RUN wget http://download.osgeo.org/gdal/2.4.0/gdal-2.4.0.tar.gz && \
  +
  +RUN cd /tmp && wget http://download.osgeo.org/gdal/2.4.0/gdal-2.4.0.tar.gz && \
       tar zxvf gdal-2.4.0.tar.gz && cd gdal-2.4.0/ && \
       ./configure --prefix=/usr/local --with-python --with-sfcgal=no && \
       make -j4 && \
  
positive.code:     ldconfig
  
  
  # Set working directory and user
  #
  WORKDIR /opt/app-root/gwells
  
  USER 1001
  
negative.code: 
  # Install and configure PROJ.4
  #
  
  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 && \
  