Hi. Because this package was orphaned (due to retirement of Daniel) and not even present in testing or unstable, I went ahead and uploaded a fix for stable. Debdiff attached.
Thanks.
diff -Nru didjvu-0.8.2/debian/changelog didjvu-0.8.2/debian/changelog --- didjvu-0.8.2/debian/changelog 2019-02-27 05:34:17.000000000 +0100 +++ didjvu-0.8.2/debian/changelog 2021-01-04 20:11:00.000000000 +0100 @@ -1,3 +1,10 @@ +didjvu (0.8.2-2+deb10u1) buster; urgency=medium + + * Add missing build-dependency on tzdata. Closes: #943695. + * Package is orphaned, set Maintainer to "Debian QA Group". + + -- Santiago Vila <sanv...@debian.org> Mon, 04 Jan 2021 20:11:00 +0100 + didjvu (0.8.2-2) unstable; urgency=medium * drop python-libxmp from deps throughout (Closes: #921747). diff -Nru didjvu-0.8.2/debian/control didjvu-0.8.2/debian/control --- didjvu-0.8.2/debian/control 2019-02-27 05:29:59.000000000 +0100 +++ didjvu-0.8.2/debian/control 2021-01-04 20:00:00.000000000 +0100 @@ -1,5 +1,5 @@ Source: didjvu -Maintainer: Daniel Stender <sten...@debian.org> +Maintainer: Debian QA Group <packa...@qa.debian.org> Uploaders: Python Applications Packaging Team <python-apps-t...@lists.alioth.debian.org> Section: graphics @@ -14,7 +14,8 @@ python-gamera, gir1.2-gexiv2-0.10 (>= 0.10.3), python-gi, python-nose, - python-pil + python-pil, + tzdata Standards-Version: 4.1.3 Homepage: http://jwilk.net/software/didjvu Vcs-Git: https://salsa.debian.org/python-team/applications/didjvu.git