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

      init.services.mautrix-signal = {
        enabled = true;
        shutdownOnExit = true;
        script = pkgs.writeShellScript "mautrix-signal" ''
          DATA_DIR="/var/lib/mautrix-signal"
          CONFIG_FILE="$DATA_DIR/config.yaml"
          REGISTRATION_FILE="/var/lib/registrations/mautrix-signal.yaml"
          DB_FILE="$DATA_DIR/sqlite.db"

          cp ${./mautrix-signal.yaml} "$CONFIG_FILE" ; chmod 755 "$CONFIG_FILE"

          [ -e "$REGISTRATION_FILE" ] || \
            ${lib.getExe' pkgs.mautrix-signal "mautrix-signal"} -c "$CONFIG_FILE" -r "$REGISTRATION_FILE" -g
          sed -i \
            -e 's/@AS_TOKEN@/'"$(${lib.getExe pkgs.yq} -r '.as_token' "$REGISTRATION_FILE")/" \
            -e 's/@HS_TOKEN@/'"$(${lib.getExe pkgs.yq} -r '.hs_token' "$REGISTRATION_FILE")/" \
            "$CONFIG_FILE"
          ${lib.getExe' pkgs.mautrix-signal "mautrix-signal"} -c "$CONFIG_FILE" -r "$REGISTRATION_FILE" -n
        '';
      };
    };
  };
}