anchor.diff:                "mount LABEL=boot /mnt/boot",
             );
           '';
  -      fileSystems = rootFS + bootFS;
       };
   
     # Create two physical LVM partitions combined into one volume group
  
positive.code:   # The test script boots the CD, installs NixOS on an empty hard
    # disk, and then reboot from the hard disk.  It's parameterized with
    # a test script fragment `createPartitions', which must create
    # partitions and filesystems, and a configuration.nix fragment
    # `fileSystems'.
    testScriptFun = { createPartitions, fileSystems, testChannel, grubVersion, grubDevice }:
      let iface = if grubVersion == 1 then "scsi" else "virtio"; in
      ''
        createDisk("harddisk", 4 * 1024);
  
negative.code:               "mount LABEL=nixos /mnt",
            );
          '';
        testChannel = true;
      };
  
  