{ lib, ... }: let inherit (lib.modules) mkRemovedOptionModule; in { imports = [ (mkRemovedOptionModule [ "services" "lsfg-vk" ] '' The lsfg-vk-flake NixOS module has been removed as adding packages to the environment is already sufficient. Simply add lsfg-vk & lsfg-vk-ui to your environment.systemPackages: environment.systemPackages = [ pkgs.lsfg-vk pkgs.lsfg-vk-ui ]; '' ) ]; }