/usr/share/guile-gnome-2/gnome/defs/ is in guile-gnome2-dev 2.16.4-5.
This file is owned by root:root, with mode 0o755.
..
/usr/share/guile-gnome-2/gnome/defs/applet.defs
/usr/share/guile-gnome-2/gnome/defs/art.defs
/usr/share/guile-gnome-2/gnome/defs/atk-types.defs
/usr/share/guile-gnome-2/gnome/defs/atk.defs
/usr/share/guile-gnome-2/gnome/defs/bonobo-types.defs
/usr/share/guile-gnome-2/gnome/defs/bonobo.defs
/usr/share/guile-gnome-2/gnome/defs/bonoboui-types.defs
/usr/share/guile-gnome-2/gnome/defs/bonoboui.defs
/usr/share/guile-gnome-2/gnome/defs/common-ignores.defs
/usr/share/guile-gnome-2/gnome/defs/gconf-types.defs
/usr/share/guile-gnome-2/gnome/defs/gconf.defs
/usr/share/guile-gnome-2/gnome/defs/gdk-pixbuf-types.defs
/usr/share/guile-gnome-2/gnome/defs/gdk-pixbuf.defs
/usr/share/guile-gnome-2/gnome/defs/gdk-types.defs
/usr/share/guile-gnome-2/gnome/defs/gdk.defs
/usr/share/guile-gnome-2/gnome/defs/glib-types.defs
/usr/share/guile-gnome-2/gnome/defs/glib.defs
/usr/share/guile-gnome-2/gnome/defs/gnome-vfs-types.defs
/usr/share/guile-gnome-2/gnome/defs/gnome-vfs.defs
/usr/share/guile-gnome-2/gnome/defs/gtk-types.defs
/usr/share/guile-gnome-2/gnome/defs/gtk.defs
/usr/share/guile-gnome-2/gnome/defs/gtkhtml2.defs
/usr/share/guile-gnome-2/gnome/defs/gtksourceview-overrides.defs
/usr/share/guile-gnome-2/gnome/defs/gtksourceview.defs
/usr/share/guile-gnome-2/gnome/defs/libgda-overrides.defs
/usr/share/guile-gnome-2/gnome/defs/libgda-types.defs
/usr/share/guile-gnome-2/gnome/defs/libgda.defs
/usr/share/guile-gnome-2/gnome/defs/libglade-types.defs
/usr/share/guile-gnome-2/gnome/defs/libglade.defs
/usr/share/guile-gnome-2/gnome/defs/libgnome-types.defs
/usr/share/guile-gnome-2/gnome/defs/libgnome.defs
/usr/share/guile-gnome-2/gnome/defs/libgnomecanvas-types.defs
/usr/share/guile-gnome-2/gnome/defs/libgnomecanvas.defs
/usr/share/guile-gnome-2/gnome/defs/libgnomeui-types.defs
/usr/share/guile-gnome-2/gnome/defs/libgnomeui.defs
/usr/share/guile-gnome-2/gnome/defs/nautilus.defs
/usr/share/guile-gnome-2/gnome/defs/pango-types.defs
/usr/share/guile-gnome-2/gnome/defs/pango.defs
/usr/share/guile-gnome-2/gnome/defs/pangocairo-types.defs
/usr/share/guile-gnome-2/gnome/defs/pangocairo.defs
/usr/share/guile-gnome-2/gnome/defs/print.defs
/usr/share/guile-gnome-2/gnome/defs/printui.defs
/usr/share/guile-gnome-2/gnome/defs/vte-overrides.defs
/usr/share/guile-gnome-2/gnome/defs/vte.defs