All reports of unsupported-source-format for the archive. The extended description of this tag is:

This package uses a different source package format than "1.0", "3.0 (quilt)" or "3.0 (native)". Other package formats are supported by dpkg-source, but they are not allowed in the Debian archive.

Severity: serious, Certainty: certain

Check: fields, Type: binary, udeb, source

This tag has not been emitted in any package tested by Lintian.