> the substitution might be doable via debhelper's built-in substitution > instead of dh-exec (assuming that is the main driver behind the change).
Thanks! This trick would have made my patch far less intrusive. However, now that it is written and tested (clean/build/lintian/autopkgtest/debdiff on .debs), I suggest to keep it. Compared to environment variables, command line arguments have a limited explicit scope, and their actual value is visible in logs.
