If you unzip the data zip, you can go to the Meta-inf folder, com, google, android, and you will find the updater-script file.
The second and third line say "ext4" for mounting the /system partition.
Change that to "f2fs" instead. Rezip the contents and try flashing that.
My computer is elsewhere at present to download files, perhaps latter this weekend I can put one together of you don't get a chance to try it.
Let me know how it goes!