Problem with Pillow in buildozer

[Kaktus994]

Hello everyone,

I'm new to programming as well as to github so apologies in advance if something in this post does not follow protocols and rules.
After a couple tutorials on python and few on kivy I've decided to continue learning through building an app. So, I hit a bump which i could not overcome. Namely, code works perfectly on Windows and Ubuntu 18.04 but I wanted to deploy it to Android using buildozer it crashes with infamous error:

Build failed: Didn't find any valid dependency graphs. This means that some of your requirements pull in conflicting dependencies.

due to Pillow requirement in

buildozer.spec

I've tried overwriting Pillow recipe with:
https://github.com/kivy/python-for-android/tree/master/pythonforandroid/recipes/Pillow

also read and followed everything from:
kivy/python-for-android#1339
https://github.com/kivy-garden/garden.zbarcam

Here are main.py and spec files:
https://github.com/Kaktus994/BarcodeGenerator

Obviously I'm doing something wrong. Hoping that someone will help me to resolve the issue. Thanks in advance