1. Backup existing vagrant machine by creating a snapshot using VirtualBox's interface
  2. Stop the virtual machine: vagrant halt
  3. Move the R1 directory aside:

    cd ..
    mv avalon-installer-flat avalon-installer-flat-r1
  4. Download and extract the Avalon install script (as a zip or tar.gz)
  5. In a terminal window, cd to the avalon-installer-flat directory you just extracted