Couldn't update my #NIxOS on my old #MacBookAir anymore. Got an error from compiler for a kernel module specific to MacBooks Backlight.

I know that a new kernel 6.1 was releases recently.
NixOS allows me to specify the kernel easily: boot.kernelPackages = pkgs.linuxKernel.packages.linux_5_15; and everything works fine again.

https://git.daniel-siepmann.de/danielsiepmann/nixpkgs/commit/1be9c42770873c8a77417ed8fcbc5ced855eb20a

There was not a single issue due to using Nix/NixOS as rolling release I couldn't fix within a short amount of time with the help of Nix/NixOS itself.