How do you use python-decouple to load a .env file outside the expected paths?

I'm forced to keep my .env file in a non-standard path outside the root of my project (in a separate directory altogether).

Let's say I have my Django project in /var/projects/my_project, though I have my .env file in /opt/envs/my-project/.env where my SECRET_KEY is stored. In my settings.py file, I'd like to explicitly use the .env file at that path so that I can still do this:

from decouple import configsecret_key = config('SECRET_KEY')