anchor.diff:  ENV FIREFOX_VERSION 66.0
   ENV FTP_LIBRARY_VERSION 1.6
   ENV GECKO_DRIVER_VERSION v0.22.0
  -ENV PABOT_VERSION 0.53
  +ENV PABOT_VERSION 0.63
   ENV REQUESTS_VERSION 0.5.0
   ENV ROBOT_FRAMEWORK_VERSION 3.1.1
   ENV SELENIUM_LIBRARY_VERSION 3.3.1
  
positive.code:     coreutils \
      xvfb=~$XVFB_VERSION \
    && mv /usr/lib/chromium/chrome /usr/lib/chromium/chrome-original \
  # FIXME: above is a workaround, as the path is ignored
  
  # Install Robot Framework and Selenium Library
  
negative.code: ENV SCREEN_WIDTH 1920
  
  # Set number of threads for parallel execution
  # By default, no parallelisation
  ENV ROBOT_THREADS 1
  
  # Dependency versions
  