Hello,
I found the following document, probably it could help you:
Android 6 Marshmallow over Network File System (NFS) on the Wandboard – Using Android in Industrial ...
Unfortunately, the wandboard is a third party board and we could not give further support. I suggest you go with wandboard probably they could help you better with this problem. Also, I cannot guarantee if the given information may work since we do not have a way to test it for the reason that our BSP is different from the wandboard. It is up to you if you want to test it.
I apologize for the inconvenience this may give you.
Best regards,
Diego.