I was waiting for GExiv2 to merge a patch I submitted:
https://gitlab.gnome.org/GNOME/gexiv2/-/merge_requests/20
Then we waited for it to land in a released version then for this
version to be in Debian testing. It's all done now and we bumped the
GExiv2 dependency in the previous commit (which makes it a master-only
fix). So all good.