Cannot access GPU from unprivileged container (/dev/dri does not exist)

My proxmox host has a dedicated nvidia 980 GPU that I have set up for pass through. I am able to successfully pass it through to a Linux VM that I have but now I'm trying to set up KASM in an LXC and get the card passed through to that as well for hardware acceleration. The container is unprivileged and I was following this YT guide https://www.youtube.com/watch?v=0ZDr5h52OOE but when I got to the step to access `/dev/dri` I couldn't as it didn't exist.

I came across this forum...

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