The tag is present in Lintian version 2.104.328. That is the most recent version we know about.
The maintainer script calls the
install-docs command without
checking for existence first. (The
doc-base package which provides
the command is not marked as "essential" package.)
For example, use the following code in your maintainer script: if which install-docs > /dev/null; then install-docs -i /usr/share/doc-base/<your-package> fi