HP Deskjet 3050 j610 on Crunchbang Waldorf

My printer works well with the latest version of HPLIP available on Debian Testing (Wheezy). I've installed it with ease in a Gnome environment and in XFCE, so I was rather surprised to find that it didn't work in Crunchbang Waldorf, which is based on Wheezy.

After several hours Goolgling, I found the problem: not all the required dependencies of HPLIP are installed in Waldorf, and the required user permissions are not set.

To check if HPLIP is set up correctly, run:

sudo hp-check -t

If there are unmet dependencies or permission issues, run the required fix to install and add automatically.

My symptoms were:

Could see printer in System>Printers>Configure Printers but not use.
Could see printer in device setup HPLIP gui (hp-toolbox) but not install.
Could install printer via hp-setup as root, but could not print from inside web pages (could print a text file) and could not administer printer from Device Manager.