e57c0f3bf9
If the X server is run manually it must be started with an `-xkbdir` argument pointing to the custom xkb directory. So we export it to /etc/X11/xkb.
*** 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.