{ pkgs, lib, config, ... }:
let
  lightControlConfig = pkgs.writeText "light-control.json"
    (lib.fileContents <assets/light-control.json>);

in {
  systemd.services."light-control" = {
    wantedBy = [ "multi-user.target" ];
    environment = { RUST_LOG = "rust_iot=trace"; };
    script = ''
      ${pkgs.light-control}/bin/rust-iot ${lightControlConfig}
    '';
  };
}