gnome-extra/sushi fails to build: fatal error: gdk/gdkwayland.h: No such file or directory

I am trying to install the gnome-extra/sushi this overlay provides, and I get this error while building (btw not using wayland):
```
../sushi-3.34.0/src/libsushi/externalwindow-wayland.c:24:10: fatal error: gdk/gdkwayland.h: No such file or directory
   24 | #include <gdk/gdkwayland.h>
      |          ^~~~~~~~~~~~~~~~~~
compilation terminated.
```