# sudo nano /etc/apt/sources.list (et y ajouter la ligne "deb-src http://mirrordirector.raspbian.org/raspbian/ wheezy main contrib non-free rpi")
# sudo apt-get update
# sudo apt-get build-dep unrar-nonfree
# sudo apt-get source -b unrar-nonfree
# sudo dpkg -i unrar*.deb