This configuration includes a fix to get the speakers working on kernels earlier than 6.9.0. Kernels after 6.9.0 already have this patch built-in.
$ nix-info -m
- system: `"x86_64-linux"`
- host os: `Linux 6.8.2-zen2, NixOS, 24.05 (Uakari), 24.05.20240403.fd281bd`
- multi-user?: `yes`
- sandbox: `yes`
- version: `nix-env (Nix) 2.18.2`
- channels(root): `""`
- nixpkgs: `/home/aires/.nix-defexpr/channels/nixpkgs`