well, thanks Lapineige
please have a look here https://forum.yunohost.org/t/setting-up-deb-package-sources-failed/1808/10; I did not manage to install it on my BunsenLabs (Jessie 8.6 distro) with the script, which is why I am asking for the image.
I do not have a raspberry but plan to run if off Jessie