how can I use portmaster to update but skip a package

[Antonio Olivares]

Dear folks,

I am trying to update one of my machines and I ran portmaster -a and got errors:

http://forums.freebsd.org/showthread.php?p=145268

I overcome most by unselecting GNUTLS from cups-image and cups-base,
and then comes

===>>> Launching child to update libreoffice-3.3.3_2 to libreoffice-3.4.2_1

===>>> Port directory: /usr/ports/editors/libreoffice

	===>>> This port is marked BROKEN
	===>>> build is too fragile and break too often -- try libreoffice-legacy

	===>>> If you are sure you can build it, remove the
	       BROKEN line in the Makefile and try again.

===>>> Update for libreoffice-3.3.3_2 failed
===>>> Aborting update

Is there a way to update most packages except this one?

or should I uninstall it and reinstall it again later?  This is not
optimal, but it would be something I can try.  I would prefer not to
do this :(

Thanks in advance,

Antonio