Please see the Debian bug: "Note that the variable is called DEB_AUTO_UPDATE_ACLOCAL, not DEB_AUTO_CREATE_ACLOCAL, so the feature works as designed.". However, it would be nice to fix the macro to do that as well.
I won't apply the patch for now, since it changes existing behaviour which is prone to break packages.
Please see the Debian bug: "Note that the variable is called DEB_AUTO_ UPDATE_ ACLOCAL, not DEB_AUTO_ CREATE_ ACLOCAL, so the feature works as designed.". However, it would be nice to fix the macro to do that as well.
I won't apply the patch for now, since it changes existing behaviour which is prone to break packages.