I second this feature request! Something like debuild's --preserve-envvar= would be just fine with me (allows for simple regexps, but can also easily list multiple env vars to preserve).
-- Loïc Minier -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org