Comment 14 for bug 2049695

Well, I added edubuntu build in our CI test suite and now this is failing because the builds are using all the disk space.

See https://github.com/canonical/ubuntu-image/actions/runs/7665245789/job/20891977541?pr=178

I will merge my solution anyway because it seems to improve things and to let you try Erich once the new version is available in latest/edge while I try to have these builds work properly together.