When I builld gtk3 with prt-get depinstall gtk3 it fails with this message:

CC       libgtk_3_la-gtkmountoperation-x11.lo
CCLD     libgtk-3.la
CC       queryimmodules.o
CCLD     gtk-query-immodules-3.0
CC       gtk-launch.o
CCLD     gtk-launch
GISCAN Gtk-3.0.gir
Usage: g-ir-scanner [options] sources

g-ir-scanner: error: no such option: -f
make[4]: *** [Gtk-3.0.gir] Error 2
make[4]: Leaving directory `/usr/ports/opt/gtk3/work/src/gtk+-3.10.3/gtk'
make[3]: *** [all-recursive] Error 1