85898da27a
As discussed on https://github.com/NixOS/nixpkgs/pull/9642, the option is not necessary because all desktop managers already stopped handling it (and delegated to systemd).
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at http://nixos.org/nixos and in the manual in doc/manual.