lintian errors do not count as a build failure. You could file this as a bug in Debian if you like -- we'll pick up the fix from there in due course.
** Changed in: fontconfig (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to fontconfig in Ubuntu. https://bugs.launchpad.net/bugs/1993008 Title: ftbfs: E: fontconfig: alien-tag fc-cache-used-in-maintainer-script Status in fontconfig package in Ubuntu: Invalid Bug description: When trying to build from source using debuild -us -uc -b the result errors out with Now running lintian fontconfig_2.13.1-4.4ubuntu1_amd64.changes ... E: fontconfig: alien-tag fc-cache-used-in-maintainer-script [usr/share/lintian/overrides/fontconfig:1] W: libfontconfig-doc: bad-whatis-entry [usr/share/man/man3/FcPatternIterNext.3.gz] from: https://www.mit.edu/afs.new/sipb/project/debathena/lintian/www/tags/fc-cache-used-in-maintainer-script.html "This script apparently runs fc-cache. Updating of the fontconfig cache files is now handled automatically by triggers, so running fc-cache from maintainer scripts is no longer necessary." ubuntu: kinetic kudu libfontconfig1-dev: Installed: 2.13.1-4.4ubuntu1 Candidate: 2.13.1-4.4ubuntu1 Version table: *** 2.13.1-4.4ubuntu1 500 500 http://ubuntu.hysing.is/ubuntu kinetic/main amd64 Packages 100 /var/lib/dpkg/status ProblemType: Bug DistroRelease: Ubuntu 22.10 Package: libfontconfig-dev 2.13.1-4.4ubuntu1 Uname: Linux 6.0.1-gnulibre x86_64 ApportVersion: 2.23.1-0ubuntu3 Architecture: amd64 CasperMD5CheckResult: unknown Date: Fri Oct 14 21:07:42 2022 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: fontconfig UpgradeStatus: Upgraded to kinetic on 2022-10-14 (0 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/fontconfig/+bug/1993008/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp