=== modified file 'debian/source/lintian-overrides'
--- debian/source/lintian-overrides	2019-07-27 19:48:18 +0000
+++ debian/source/lintian-overrides	2019-08-05 21:03:31 +0000
@@ -2,3 +2,6 @@
 # .asc signature can not exist until after the orig.tar.gz has been
 # built as part of the Debian package build.
 mandos source: orig-tarball-missing-upstream-signature mandos_*.tar.gz
+
+# We want to backport to stretch for as long as reasonably practical
+mandos source: package-uses-old-debhelper-compat-version 10