Chromium is broken on fresh reinstall

Hello! I just reinstalled NixOS and Chromium is not working. 2 hours ago, I had a working installation of NixOS unstable (chromium worked too). I reinstalled my system, added the unstable channel and used the exact same configuration to build it. Now, when I open chromium, there is a blank window (transparent, as my compositor is running in the background. I tested with nix-shell and the stable (23.11) version works with no problems. I am new to NixOS, so I suspect that I have done something wrong. How should I fix this?

The following is a link to my nixos configuration flake repository: