anchor.diff:        # Clean up existing machined registration and interfaces.
         machinectl terminate "$INSTANCE" 2> /dev/null || true
   
  -      if [ -n "$HOST_ADDRESS" ] || [ -n "$LOCAL_ADDRESS" ]; then
  +      if [ -n "$HOST_ADDRESS" ]  || [ -n "$LOCAL_ADDRESS" ] ||
  +         [ -n "$HOST_ADDRESS6" ] || [ -n "$LOCAL_ADDRESS6" ]; then
           ip link del dev "ve-$INSTANCE" 2> /dev/null || true
           ip link del dev "vb-$INSTANCE" 2> /dev/null || true
         fi
  
positive.code:         #! ${pkgs.runtimeShell} -e
  
          # Initialise the container side of the veth pair.
          if [ -n "$HOST_ADDRESS" ] || [ -n "$LOCAL_ADDRESS" ] || [ -n "$HOST_BRIDGE" ]; then
  
            ip link set host0 name eth0
            ip link set dev eth0 up
  
  
negative.code:           '';
      in
        ''
          if [ -n "$HOST_ADDRESS" ]  || [ -n "$LOCAL_ADDRESS" ] ||
             [ -n "$HOST_ADDRESS6" ] || [ -n "$LOCAL_ADDRESS6" ]; then
            if [ -z "$HOST_BRIDGE" ]; then
              ifaceHost=ve-$INSTANCE
              ip link set dev $ifaceHost up
  