Package: gir1.2-gtd-1.0 Version: 3.28.1-2 Severity: serious ${gir:Depends} needs "dh --with gir" in debian/rules.
Something might still go wrong after that, when trying it did not generate dependencies on any library: Depends: gir1.2-glib-2.0, gir1.2-gtk-3.0 (>= 3.19.5)