I would like to point out that this question "No space left on device" when installing packages, yet I have space left should not be a duplicate of this other How do I resolve unmet dependencies?
apt-get
fails due to No space left on device
so I don't think that is related to unmet dependencies.
I apologize, I tried to use the chat, but without success, and I'm not sure that flag is the right way to point out possible wrong closed question, isn't it?