anchor.diff:  
       security.setuidOwners = singleton
         { program = "dbus-daemon-launch-helper";
  -        source = "${dbus}/libexec/dbus-daemon-launch-helper";
  +        source = "${pkgs.dbus_daemon}/libexec/dbus-daemon-launch-helper";
           owner = "root";
           group = "messagebus";
           setuid = true;
  
positive.code:             chown messagebus ${homeDir}
  
              mkdir -m 0755 -p /var/lib/dbus
              ${dbus.tools}/bin/dbus-uuidgen --ensure
   
              rm -f ${homeDir}/pid
            '';
  
          daemonType = "fork";
  
          exec = "${dbus}/bin/dbus-daemon --system";
  
          postStop =
            ''
  
negative.code:           -e 's|<standard_system_servicedirs/>|${systemServiceDirs}|' \
            -e 's|<includedir>system.d</includedir>|${systemIncludeDirs}|'
  
        cp ${pkgs.dbus_daemon}/etc/dbus-1/session.conf $out/session.conf
        
        # Add the services and session.d directories to the session bus
        # search path.
  