Debian 8 - Unable to install ERPNext

With the easy way : https://github.com/frappe/bench#easy-way

# sudo bash setup_frappe.sh --setup-production
Installing for debian 8 amd64
In case you encounter an error, you can post on https://discuss.frappe.io

Adding debian mariadb repo
Installing packages for debian. This might take time...
Reading package lists...
Building dependency tree...
Reading state information...
build-essential is already the newest version.
fontconfig is already the newest version.
git is already the newest version.
htop is already the newest version.
libcrypto++-dev is already the newest version.
libxext6 is already the newest version.
libxrender1 is already the newest version.
libxslt1-dev is already the newest version.
libxslt1.1 is already the newest version.
libssl-dev is already the newest version.
postfix is already the newest version.
python-dev is already the newest version.
python-pip is already the newest version.
python-setuptools is already the newest version.
redis-server is already the newest version.
supervisor is already the newest version.
vim is already the newest version.
xfonts-75dpi is already the newest version.
xfonts-base is already the newest version.
ntp is already the newest version.
screen is already the newest version.
mariadb-common is already the newest version.
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 nodejs : Conflicts: npm
E: Unable to correct problems, you have held broken packages.

I have tried different methods and I always get the same error.

# nodejs -v
v0.12.7
# npm -v
3.5.1

Any help ?

Currently Debian 7 is the latest supported version.