anchor.diff:        $out/etc/systemd/system/dbus-org.freedesktop.ModemManager1.service
     '';
   
  -  meta = with stdenv.lib; {
  +  meta = with lib; {
       description = "WWAN modem manager, part of NetworkManager";
       homepage = https://www.freedesktop.org/wiki/Software/ModemManager/;
       license = licenses.gpl2;
  
positive.code: { stdenv
  , fetchurl
  
  , glib
  , systemd_lib
  
negative.code: }:
  
  stdenv.mkDerivation rec {
    name = "ModemManager-1.6.6";
  
    src = fetchurl {
      url = "https://www.freedesktop.org/software/ModemManager/${name}.tar.xz";
      multihash = "QmUwz9xbS2LsCKmBWXrbjT1z4kZx9osqHfVYFFJ8hNN2Fk";
      sha256 = "b050aa0d9e0dd7cb2f22451efecfa2ac53b9a70d26da211b0e8bbc1ecba58a43";
    };
  
    nativeBuildInputs = [
  