anchor.diff:      && cd python-for-android \
       && git remote add sombernight https://github.com/SomberNight/python-for-android \
       && git fetch --all \
  -    && git checkout 86eeec7c19679a5886d5e095ce0a43f1da138f87 \
  +    && git checkout fad5dd2fdc9b116b7621470deac501e4a7c4cc11 \
  +       # allowBackup="false":
  +    && git cherry-pick 86eeec7c19679a5886d5e095ce0a43f1da138f87 \
       && python3 -m pip install -e .
   
   # build env vars
  
positive.code: 
  
  ENV ANDROID_NDK_HOME="${ANDROID_HOME}/android-ndk"
  ENV ANDROID_NDK_VERSION="14b"
  ENV ANDROID_NDK_HOME_V="${ANDROID_NDK_HOME}-r${ANDROID_NDK_VERSION}"
  
  # get the latest version from https://developer.android.com/ndk/downloads/index.html
  
negative.code: RUN pip install --upgrade cython==0.29
  RUN python3 -m pip install --upgrade cython==0.29
  
  # prepare git
  RUN git config --global user.name "John Doe" \
      && git config --global user.email johndoe@example.com
  
  # install buildozer
  RUN cd /opt \
      && git clone https://github.com/kivy/buildozer \
  