libexo from svn error...

[Jon Kristian Nilsen]

Im trying to build libexo from svn, but i keep getting this error, hope 
this is enough...
-JK

make[3]: Entering directory 
`/home/slackmartian/apps/desktop/xfce-svn/libexo/docs/reference'
xsltproc -nonet 
http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl 
exo-csource.xml
warning: failed to load external entity 
"http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl"
cannot parse 
http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl
make[3]: *** [exo-csource.1] Error 4
make[3]: Leaving directory 
`/home/slackmartian/apps/desktop/xfce-svn/libexo/docs/reference'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory 
`/home/slackmartian/apps/desktop/xfce-svn/libexo/docs'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/slackmartian/apps/desktop/xfce-svn/libexo'
make: *** [all] Error 2