anchor.diff:  ADD requirements.txt /var/python/requirements.txt
   RUN pip3 install -r /var/python/requirements.txt
   
  -RUN touch /tmp/cache_spoof_1
  +RUN touch /tmp/cache_spoof_2
   
   # FIXME: doesn't install all dependencies!
   # RUN pip3 install git+https://github.com/graphicore/fontbakery@dashboard_related
  
positive.code: #    pip3 install /var/fontbakery;
  
  # FIXME: probably all `pip3 install dependencies should be in requirements.txt
  RUN pip3 install fontbakery;
  
  # tools used for live debugging and profiling
  
negative.code: # eoan == 19.08 NOT LTS  End of Life: July, 2020
  FROM ubuntu:eoan
  
  RUN touch /tmp/cache_spoof_2
  
  
  # START TZCONFIG FIX suggested in:
  