This works for my Debian 7:
1) As root:
apt-get install clearlooks-phenix-theme
2) As user:
ln -s /usr/share/themes/Clearlooks-Phenix/gtk-3.0 ~/.config/gtk-3.0
This works for my Debian 7:
1) As root:
apt-get install clearlooks-phenix-theme
2) As user:
ln -s /usr/share/themes/Clearlooks-Phenix/gtk-3.0 ~/.config/gtk-3.0