Add variant used in the error message displayed

build.sh

@@ -64,7 +64,7 @@ failure() {
 	# Cleanup update-kali-menu that might stay around so that the
 	# build chroot can be properly unmounted
 	$SUDO pkill -f update-kali-menu || true
-	echo "Build of $KALI_DIST/$KALI_ARCH live image failed (see build.log for details)" >&2
+	echo "Build of $KALI_DIST/$KALI_VARIANT/$KALI_ARCH live image failed (see build.log for details)" >&2
 	exit 2
 }