there is an error with this package's VCS, or the debian/changelog file inside
it. Please check the error shown below and try to fix it. You might have
to update the VCS URL in the debian/control file to point to the correct
svn: E170013: Unable to connect to a repository at URL 'svn://anonscm.debian.org/debian-xml-sgml/packages/docbook-ebnf/trunk/debian'
svn: E000111: Can't connect to host 'anonscm.debian.org': Connection refused