Subfolder imports do not show up on Main file

This is close to #106 but I don't think that is resolved. I have the following setup:

Main
-fold1 - a.py
-fold2 - fold2.1 - b.py
- fold2.2 - fold2.2.1 - c.py

if I do pipreqs in Main, the imports from b.py or c.py do not show up.
I needed to do separately pipreqs main/fold2 and main/fold2/fold2.2