Maybe an intermediate measure could still be taken, by unmounting bindmounts from the builddir. Currently, data loss can happen when one blindly runs "sudo rm -rf" on such a builddir without first manually checking and unmounting those.
The gravity of such a mistake depends on root perms on those bindmounted dirs, obviously, so it may happen that you only have nfs-mounted trees bindmounted, but hey, that's probably far from the common case (although, but luck, it is mine :) -- Yann Dirson - Bertin Technologies -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org