Sunshine on NixOS not working as expected

I understand that NixOS is a niche distribution, but hopefully someone here can help me troubleshoot what is happening on my system.

I can install the the sunshine host, and connect to it from a moonshine client.

However, I’m unable to edit the apps in the Sunshine UI, which gives me a permission error. I can edit them in the .config/sunshine directory, but that is not ideal.

Additionally, I can’t connect to steam in big picture mode. Instead, it will just connect to the desktop. This remains true even when I update the steam command to open with the gamepadui flag. I did confirm that the exact command on sunshine will open steam correctly when I run it directly on my terminal.

Anyone knows what could be happening? For setting up sunshine, all I did was follow this wiki: https://nixos.wiki/wiki/Sunshine