Can't install gtkmm-3.24.5 from source (Crux 3.6 x86_64 desktop)

Meson finds dependencies ok, configures, but when ninja tries to compile a whole bunch of errors appear, a lot to do with unix-print. I have both gtk-2 and gtk-3 installed, mm-common installed, the gtk printing tool demos seem to work in both gtk2 and gtk3 but the logs attached seem to indicate meson wants to use gtk-2.

Inkscape says it needs gtkmm-3 and so does gparted so any help would be welcome. Perhaps I have to do something to configure gtk-2 and gtk-3.
Attached Files

	gtkmm-3.24.5-build.log (3.8 KB)
	gtkmm-3.24.5-ninja.log (124.9 KB)
	env.txt (3.2 KB)