# Shared files directory.
	#
	# Most often `nit/share/`.
	var share_dir: String is lazy do
		var sharedir = opt_share_dir.value
		if sharedir == null then
			sharedir = nit_dir / "share"
			if not sharedir.file_exists then
				fatal_error(null, "Fatal Error: cannot locate shared files directory in {sharedir}. Uses --share-dir to define it's location.")
			end
		end
		return sharedir
	end