anchor.diff:    unstable = makeZfsTest "unstable" {
       enableUnstable = true;
       extraTest = ''
  -      $machine->succeed(
  -        "echo password | zpool create -o altroot='/tmp/mnt' -O encryption=aes-256-gcm -O keyformat=passphrase rpool /dev/vdb1",
  +      machine.succeed(
  +        "echo password | zpool create -o altroot=\"/tmp/mnt\" -O encryption=aes-256-gcm -O keyformat=passphrase rpool /dev/vdb1",
           "zfs create -o mountpoint=legacy rpool/root",
           "mount -t zfs rpool/root /tmp/mnt",
           "udevadm settle",
  
positive.code:         "umount /tmp/mnt",
          "zpool destroy rpool",
          "udevadm settle"
        );
      '';
    };
  
  
negative.code: 
  let
  
    makeTest = import ./make-test-python.nix;
  
    makeZfsTest = name:
      { kernelPackage ? pkgs.linuxPackages_latest
  