The package uses a variable in one of its debhelper config files, but the variable is not one known to dpkg-architecture.
It is recommended to use a known subset of variables. If the package needs more than that, and makes sure the variable is exported through the build one way or the other, then this tag can be safely ignored or overridden.
The tag is present in Lintian version
That is the most recent version we know about.
We use semantic versions.
The patch number is a commit step indicator relative to the
release tag in our Git
You can find the detection logic for this version at commit ca97c3a. For merge requests, please use the latest version in the Lintian check debhelper.