nix-configs/modules/desktop/specific-hardware/spacenav.nix

{ config, lib, pkgs, ... }:
{
  environment.systemPackages = with pkgs; [
      spacenavd 
      libspnav
  ];
  systemd.services.spacenavd = {
    wantedBy = [ "graphical.target" ];
    script = "${pkgs.spacenavd}/bin/spacenavd -d";
  };
}