All reports of lzma-deb-archive for the archive. The extended description of this tag is:

The data portion of this binary package is compressed with lzma. This is supported by dpkg but not yet permitted in the Debian archive. Such a package will be rejected by DAK.

Severity: serious, Certainty: certain

Check: deb-format, Type: binary, udeb

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