Chromebook cgpt add error

Hello, I have been trying to install kali onto my samsung chromebook but am getting hung up when i enter the code

Code:

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cgpt add -i 2 -S 1 -T 5 -P 5 -l KERN-B /dev/mmcblk1

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and get the error

Code:

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ERROR: cgpt add: -t, -b, and -s options are required for new partitions

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I am trying to install to a SD card.
This is the same error that is happening on this page.
https://forums.kali.org/archive/index.php/t-18861.html

You shouldn't need to do that with the latest images at all. http://docs.kali.org/armel-armhf/ins...ung-chromebook