style sheet error when building games

[tj <999alfred comcast net>]

Well, I think I am slowly closing in on building gnome-games. But, I 
have run into another roadblock.
When make'ing it I get: the following error:

make[3]: Entering directory 
`/home/user1/src/gnome-games-2.24.3/aisleriot/help'
xsltproc -o aisleriot-C.omf --stringparam db2omf.basename aisleriot 
--stringparam db2omf.format 'docbook' --stringparam db2omf.dtd 
"-//OASIS//DTD DocBook XML V4.1.2//EN" --stringparam db2omf.lang C 
--stringparam db2omf.omf_dir "/usr/local/share/omf" --stringparam 
db2omf.help_dir "/usr/local/share/gnome/help" --stringparam 
db2omf.omf_in 
"/home/wd4nmq/src/gnome-games-2.24.3/aisleriot/help/aisleriot.omf.in"  
`/usr/bin/pkg-config --variable db2omf gnome-doc-utils` C/aisleriot.xml 
|| { rm -f "aisleriot-C.omf"; exit 1; }
compilation error: file C/aisleriot.xml line 105 element book
xsltParseStylesheetProcess : document is not a stylesheet
make[3]: *** [aisleriot-C.omf] Error 1

Anybody else had this problem, or at lest know how to solve it?

tj