anchor.diff:    '';
   
     configureFlags = [
  -    "--enable-systemd"
  +    (if enableSystemd then "--enable-systemd" else "--disable-systemd")
       "--disable-dummy"
       "--disable-cron"
       "--disable-introspection"
  
positive.code:     '';
      homepage = http://www.packagekit.org/;
      license = licenses.gpl2Plus;
      platforms = platforms.linux;
      maintainers = with maintainers; [ matthewbauer ];
    };
  }
  
negative.code:     sha256 = "11drd6ixx75q3w12am3z1npwllq1kxnhbxv0npng92c69kn291zs";
    };
  
    buildInputs = [ glib polkit python gobjectIntrospection vala_0_38 ]
                    ++ lib.optional enableSystemd systemd
                    ++ lib.optional enableBashCompletion bash-completion;
    propagatedBuildInputs = [ sqlite nix boost ];
    nativeBuildInputs = [ intltool pkgconfig autoreconfHook autoconf-archive gtk-doc ];
  