Package: dpkg Severity: wishlist X-Debbugs-Cc: Michael Biebl <biebl@debian.org>, debian-devel@lists.debian.org dpkg-source already ignores various paths for the diff when building source packages, for example ".git", ".svn", "CVS", "*~", ... Maybe $diff_ignore_default_regex should just be extended to include "__pycache__" as well and these would be non-issues. Ansgar