The tag is present in Lintian version 2.104.264. That is the most recent version we know about.
There is an assignment to a
SOURCE_DATE_EPOCH variable in the
As of dpkg 1.18.8, this is no longer necessary as dpkg exports this
variable if it is not already set. However, you can also include
to ensure it is exported.
Refer to https://reproducible-builds.org/specs/source-date-epoch/ for details.