[Freeswitch-users] debian build-all freezing at "Building sid-amd64 debs"

I am trying to tweak mod_spandsp in master and deb package the code for use in my application. I'm running "./debian/util.sh build-all -ibn -z9 -f /tmp/modules.conf" but it consistently gets stuck at "Building sid-amd64 debs.." First off, I'm not sure if this is the correct way to package custom changes, but also why is the debian build stuck at this step? Thanks!