All reports of dh-exec-private-helper for the archive. The extended description of this tag is:
The packaging file uses dh-exec, but it does not use /usr/bin/dh-exec.
If running dh-exec with the default set of helpers is not desired, use its --with or --without options instead of directly using the desired helper.
This tag has not been emitted in any package tested by Lintian.