yelp could not be built because of libxul dependency (10.0 vs. <2)

[Ewald Jenisch]

Hi,

I'm trying to get my system up2date using portupgrade as usual. 
However during the upgrade process I ran into a problem during upgrade
of yelp:

===>   yelp-2.30.2_4 depends on package: libxul<2 - not found
===>   Found libxul-10.0.10, but you need to upgrade to libxul<2.

UPDATING has an entry for www/libxul of 20120910 that says

"...If you want to stay with 1.9.2..."

So in order to make yelp build again, does this mean I've got to 
de-install libxul-10.0.10 and install /usr/ports/www/libxul19 again?

Thanks much in advance for your help,
-ewald