Make blender unaware of user/system installed add-ons I am running a customized, local install of blender from and with a script:

./blender --background --python generator-blender.py --

My customized local install of blender is prepared with add-ons that might also be present in the user/system add-on locations, which currently leads me to (e.g.) blend4web being found once as a locally installed add-on and once more as a user-installed add-on:

multiple addons with the same name:
'/home/simonrepp/AXIOM/elmyra/lib/linux/blender-2.76b-linux-glibc211-x86_6/2.76/scripts/addons/blend4web/__init__.py'
'/home/simonrepp/.config/blender/2.76/scripts/addons/blend4web/__init__.py'


How can I tell blender to ignore the user/system installed add-ons and rely solely on what is present in the local install i have set up?
In my customized, local install I needed to create an empty config/ folder inside the 2.XX/ folder (the one that contains datafiles/, python/, scripts/ already - in my case 2.67/). As soon as blender sees this folder it completely ignores any user/system add-ons (and everything else too I suppose - startup files, configuration, etc.)

I found the answer here: Need guidance for creating no dependancies between two installs of Blender