There has been significant improvement in the world of building Debian packages and We should add that to our release process, at least for the version of Ubuntu that we use for CI builds.
There is a git repo that replaces the old quilt system called git_buildpackage https://github.com/agx/git-buildpackage. Look into using that and integrating it into our CI builds.
Start with libdap
Also try to get it working for hyrax-dependencies
We could build these and store them in our own package repository and then use the libdap and hyrax .deb files to speed up the huge BES CI build