The tag is present in Lintian version 2.104.234. That is the most recent version we know about.
The package contains a
preinst maintainer script that uses
an unusual and non-essential interpreter but does not declare a
pre-dependency on the package that provides this interpreter.
preinst scripts should be written using only essential
interpreters to avoid additional dependency complexity. Please do not
add a pre-dependency without following the policy for doing so (Policy
Refer to Debian Policy Manual section 7.2 for details.