Did not know that, thank you. Do you know happen to know how it is done? When I pull the debian tarball for nginx (which has a -dbg package with symbol files) I see:
> dh_strip --dbg-package=nginx-$(*)-dbg
Which is the exact same command I use in my rules file. But instead of giving me a -dbg package with symbol files debuild gives me a -dbg package with the unstripped binary. Not sure what I am missing. I am following the DebugPackage guide on the Debian Wiki[1].