+ln -sf %{_libdir}/xwalk/libxwalk_backend_lib.so /etc/package-manager/backendlib/libxpk.so
+ln -sf %{_libdir}/xwalk/libxwalk_backend_lib.so /etc/package-manager/backendlib/libwgt.so
+ln -sf %{_libdir}/xwalk/xwalk_backend /etc/package-manager/backend/xpk
+ln -sf %{_libdir}/xwalk/xwalk_backend /etc/package-manager/backend/wgt
+
+%preun
+if [ $1 -eq 0 ] ; then
+ # don't remove if we are upgrade the rpm package
+[ -L /etc/package-manager/backendlib/libxpk.so ] && rm /etc/package-manager/backendlib/libxpk.so
+[ -L /etc/package-manager/backendlib/libwgt.so ] && rm /etc/package-manager/backendlib/libwgt.so
+[ -L /etc/package-manager/backend/xpk ] && rm /etc/package-manager/backend/xpk
+[ -L /etc/package-manager/backend/wgt ] && rm /etc/package-manager/backend/wgt
+fi
+