anchor.diff:    # partitions and filesystems.
     testScriptFun = { bootLoader, createPartitions, grubVersion, grubDevice, grubUseEfi
                     , grubIdentifier, preBootCommands, extraConfig
  +                  , testCloneConfig
                     }:
       let
         iface = if grubVersion == 1 then "ide" else "virtio";
  
positive.code:     };
  
    simpleUefiGrub = makeInstallerTest "simpleUefiGrub" simple-uefi-grub-config;
  
    # Same as the previous, but now with a separate /boot partition.
    separateBoot = makeInstallerTest "separateBoot"
  
negative.code:     , bootLoader ? "grub" # either "grub" or "systemd-boot"
      , grubVersion ? 2, grubDevice ? "/dev/vda", grubIdentifier ? "uuid", grubUseEfi ? false
      , enableOCR ? false, meta ? {}
      , testCloneConfig ? false
      }:
      makeTest {
        inherit enableOCR;
  