This is probably some useful new info: https://salsa.debian.org/eighthave/fdroidserver/-/jobs/26316
gbp:error: Error creating fdroidserver_1.0.6.orig.tar.gz: Pristine-tar couldn't checkout "fdroidserver_1.0.6.orig.tar.gz": mkdir /tmp/pristine-tar.SQkF8S8Z0J/workdir/fdroidserver-1.0.6/tests/repo/urzip-; \320\240\320\260\321\205\320\274\320\260\314\201, [r\311\220x\313\210man\312\262\311\252n\311\231f] \330\263\331\212\330\261\330\254\331\212_\330\261\330\256\331\205\330\247\331\206\331\212\331\206\331\210\331\201 \350\260\242\302\267.apk: File name too long at /usr/bin/pristine-tar line 439. pristine-tar: failed to generate tarball The fdroidserver_1.0.6.orig.tar.gz tarball contains a file with difficult unicode chars as a test that fdroidserver supports unicode well. It seems that it also has tested pristine-tar's unicode support.