anchor.diff:  # install system dependencies
   RUN apt -y update -qq \
       && apt -y install -qq --no-install-recommends \
  -        python3 virtualenv python3-pip python3-setuptools git wget lbzip2 patch sudo \
  -        software-properties-common \
  +        python3 python3-pip python3-setuptools git wget lbzip2 patch sudo \
  +        software-properties-common libssl-dev \
       && apt -y autoremove
   
   # install kivy
  
positive.code:     && cd python-for-android \
      && git remote add sombernight https://github.com/SomberNight/python-for-android \
      && git fetch --all \
      && git checkout 690a8ecc8d1c7f446d42f53a89af06c9a2d00e4e \
      && python3 -m pip install --user -e .
  
  # build env vars
  
negative.code:     && cd buildozer \
      && git remote add sombernight https://github.com/SomberNight/buildozer \
      && git fetch --all \
      && git checkout d0323c165dd5d9aa23d5eb01044474fe006c3420 \
      && python3 -m pip install --user -e .
  
  # install python-for-android
  