FreeBSD Port: docbook-xml-4.2

[James Ballantine]

While trying to install gnome2, docbook-xml fails with the following output:
 # pwd
 /usr/ports/textproc
 # cd docbook-xml
 # make deinstall clean
===>  Deinstalling for textproc/docbook-xml
===>   docbook-xml not installed, skipping
===>  Cleaning for unzip-5.50_2
===>  Cleaning for xmlcatmgr-2.0.a2
===>  Cleaning for docbook-xml-4.2_1
 # make install clean
===>  Extracting for docbook-xml-4.2_1
 >> Checksum OK for docbook-xml-4.2.zip.
===>   docbook-xml-4.2_1 depends on executable: unzip - found
===>  Patching for docbook-xml-4.2_1
===>  Configuring for docbook-xml-4.2_1
===>  Installing for docbook-xml-4.2_1
===>   docbook-xml-4.2_1 depends on file: /usr/local/bin/xmlcatmgr - found
===>   Generating temporary packing list
===>  Checking if textproc/docbook-xml already installed
for file in `unzip -l 
/usr/ports/distfiles/docbook-xml-4.2.zip|/usr/bin/awk 
'/:[0-9].*[^\/]$/{print $4}'`; do  install -c -o root -g wheel -m 444 
/usr/ports/textproc/docbook-xml/work/$file 
/usr/local/share/xml/docbook/4.2/$file;  done
xmlcatmgr: entry already exists for 
`/usr/local/share/xml/docbook/4.2/docbook.cat' of type `CATALOG'
*** Error code 1

Stop in /usr/ports/textproc/docbook-xml.

xmlcatmgr is the ports version 2.0a2 and this is a 4.9-STABLE system.

Any pointers as to what needs to be done to install this port is welcomed.

Jim Ballantine