fix incompatibility issue with ppa:ubuntu-lxc/stable and ppa:ubuntu-lxc/daily
fix incompatibility issue with ppa:ubuntu-lxc/stable and ppa:ubuntu-lxc/daily

danielhodder/vagrant-lxc,turbosquid/vagrant-lxc-squid,fpletz/vagrant-lxc,Val/vagrant-lxc,globin/vagrant-lxc,mayflower/vagrant-lxc,globin/vagrant-lxc,spheresh/vagrant-lxc,ccope/vagrant-lxc,kevinlowrie/vagrant-lxc,ccope/vagrant-lxc,spheresh/vagrant-lxc,Val/vagrant-lxc,kevinlowrie/vagrant-lxc,danielhodder/vagrant-lxc,necrose99/vagrant-lxc,Val/vagrant-lxc,spheresh/vagrant-lxc,fgrehm/vagrant-lxc,fpletz/vagrant-lxc,mayflower/vagrant-lxc,kevinlowrie/vagrant-lxc,ccope/vagrant-lxc,mayflower/vagrant-lxc,danielhodder/vagrant-lxc,turbosquid/vagrant-lxc-squid,fgrehm/vagrant-lxc,globin/vagrant-lxc,necrose99/vagrant-lxc,fgrehm/vagrant-lxc,necrose99/vagrant-lxc