How to install nyquist plug ins chrome os

Hi. I’m setting up a laptop for my boyfriend and it has chrome os on it. I have audacity installed, but the Nyquist plug in isnt there. I dont know how to find the download for it so that I can install ACX check. I have windows 10 on my computer and got everything to work just fine. I have Audacity installed through the linux beta on this computer, and i can already see some things are missing, like the filter curve EQ plug in. The loudness normalization and limiter are here though.

How do I install the ACX check without the nyquist plug in?

Which version of Audacity is installed? (Look in “Help menu > About Audacity”)