def get_build_info(self):
        """Define additional build information."""
        ReleaseScraper.get_build_info(self)

        # Internally we access builds via index
        url = urljoin(self.base_url, self.candidate_build_list_regex)
        self.logger.info('Retrieving list of candidate builds from %s' % url)

        parser = self._create_directory_parser(url)
        if not parser.entries:
            message = 'Folder for specific candidate builds at %s has not' \
                'been found' % url
            raise errors.NotFoundError(message, url)

        self.show_matching_builds(parser.entries)
        self.builds = parser.entries
        self.build_index = len(parser.entries) - 1

        if self.build_number and \
                ('build%s' % self.build_number) in self.builds:
            self.builds = ['build%s' % self.build_number]
            self.build_index = 0
            self.logger.info('Selected build: build%s' % self.build_number)
        else:
            self.logger.info('Selected build: %s' %
                             (parser.entries[self.build_index]))
Define additional build information.