DOCBOOK: website dtd newbie

[Massimiliano Mirra <list@chromatic-harp.com>]

I am trying to use xsltproc to build a website as described in
docbook.sourceforge.net/release/website/example/buildmake.html.

xsltproc always tries to download the dtd's.  I checked
/etc/sgml/docbook-website.cat and it contains:

CATALOG /usr/share/sgml/docbook/custom/website/2.0b1/catalog

I checked /usr/share/sgml/docbook/custom/website/2.0b1/catalog and it
contains:

PUBLIC "-//Norman Walsh//DTD Website V2.0b1//EN"    "website.dtd"
PUBLIC "-//Norman Walsh//DTD Website V2.0//EN"      "website.dtd"

...and so on. 

/usr/share/sgml/docbook/custom/website/2.0b1/website.dtd exists.

So the catalogs are here but I cannot seem to have xsltproc access
them.  I tried invoking it with the --docbook option and the
--catalogs option (after having set and exported $SGML_CATALOG_FILES
both to /etc/sgml/docbook-website.cat and
/usr/share/sgml/docbook/custom/website/2.0b1/catalog) with no success.
What am I missing?

Massimiliano