Hi @my5tery, thanks for your patience whilst I conferred with the developers. Unfortunately, I can now confirm that indeed the Tobii Stream Engine API for linux only support the Tobii IS4 eye tracker and not the EyeX I am afraid.
Apologies that we did not clarify this sooner for you, I will adjust the landing page to make this more clear in the future.
Accordingly, for development on the EyeX, you will need to stick with Microsoft Windows. I hope this does not cause you undue inconvenience. Thanks for your understanding.