anchor.diff:            "umount /tmp/mnt",
             "zpool destroy rpool",
             "udevadm settle"
  -
  -        );
  -
  +        )
         '' + extraTest;
   
       };
  
positive.code: 
  let
  
    makeTest = import ./make-test.nix;
  
    makeZfsTest = name:
      { kernelPackage ? pkgs.linuxPackages_latest
  
negative.code:         };
  
        testScript = ''
          machine.succeed("modprobe zfs")
          machine.succeed("zpool status")
  
          machine.succeed("ls /dev")
  
          machine.succeed(
            "mkdir /tmp/mnt",
  
            "udevadm settle",
  