--with sphinxdoc
or
dh_sphinxdoc
but no binary package specifies
${sphinxdoc:Depends}
as a dependency.
.
The sphinxdoc
helper is being used to make links to various
common files from other binary packages that are injected via the
${sphinxdoc:Depends}
substitution variable.
.
Please add ${sphinxdoc:Depends}
to the relevant binary
package.