anchor.diff:    luksroot = makeInstallerTest "luksroot"
       { createPartitions = ''
           $machine->succeed(
  -          "parted --script /dev/vda -- mklabel msdos"
  +          "flock /dev/vda parted --script /dev/vda -- mklabel msdos"
             . " mkpart primary ext2 1M 50MB" # /boot
             . " mkpart primary linux-swap 50M 1024M"
             . " mkpart primary 1024M -1s", # LUKS
  
positive.code:       createPartitions =
          ''
            $machine->succeed(
                "parted --script /dev/vda -- mklabel msdos"
                . " mkpart primary linux-swap 1M 1024M"
                . " mkpart primary 1024M -1s",
                "udevadm settle",
  
negative.code:     { createPartitions =
          ''
            $machine->succeed(
                "flock /dev/vda parted --script /dev/vda -- mklabel msdos"
                . " mkpart primary ext2 1M 50MB" # /boot
                . " mkpart primary linux-swap 50MB 1024M"
                . " mkpart primary ext2 1024M -1s", # /
  