Hassio deps

I am troubleshooting a custom_component that keeps complaining about an issue in a dependency.

After a bunch of non luck, I figure that it is referencing a dependency somewhere where I can’t see it. I physically removed the dependency from the custom deps deployment, removed it from the disk (/opt/hassio/homeassistant/deps/lib/python3.6/site-packages), and yet, it still complains about the same thing. I was expecting it to say that the dependency wasn’t found, but whatever dep it is using must be stuck somewhere where i can’t see it when i look for the file with a find command.

How do i see what dependencies are installed within hassio, and then how can i remove the dependencies so that i can instead put the dependency in the custom deps deployment?