depends perl   &&
depends python &&
depends gnome-doc-utils &&
depends docbook-dtd &&
depends docbook-xsl &&
depends itstool &&

optional_depends rarian                   \
                 '--enable-scrollkeeper'  \
                 '--disable-scrollkeeper' \
                 'register with rarian?'  &&

optional_depends libxslt \
                 '' ''   \
                 'for XML support (recommended)' &&

optional_depends docbook-sgml-dtd \
                 '' ''            \
                 'for SGML support (no longer maintained)'

.