{ inputs, config, ... }:
{
  flake.nixngConfigurations.mautrixDiscord = inputs.nixng.nglib.makeSystem {
    system = "x86_64-linux";
    name = "mautrix-discord";
    inherit (inputs) nixpkgs;
    config =
      { pkgs, lib, ... }:
      {
        dumb-init = {
          enable = true;
          type.services = { };
        };

        init.services.mautrix-discord = {
          enabled = true;
          shutdownOnExit = true;
          script =
            let
              inherit (lib)
                getExe;
              mautrix-discord = (pkgs.appendOverlays [ config.flake.overlays.mautrix-discord ]).mautrix-discord;
            in
              pkgs.writeShellScript "mautrix-discord"
                ''
              DATA_DIR="/var/lib/mautrix-discord"
              CONFIG_FILE="$DATA_DIR/config.yaml"
              REGISTRATION_FILE="/var/lib/registrations/mautrix-discord.yaml"
              DB_FILE="$DATA_DIR/sqlite.db"

              ${getExe pkgs.envsubst} < ${./mautrix-discord.yaml} > "$CONFIG_FILE"
              chmod 755 "$CONFIG_FILE"

              [ -e "$REGISTRATION_FILE" ] || \
                ${getExe mautrix-discord} -c "$CONFIG_FILE" -r "$REGISTRATION_FILE" -g
              ${getExe mautrix-discord} -c "$CONFIG_FILE" -r "$REGISTRATION_FILE" -n
            '';
        };
      };
  };
}