--- Makefile.inc1	(revision 191065)
+++ Makefile.inc1	(local)
@@ -1402,4 +1402,8 @@
 			ln -sf ../../${XDTP}/usr/bin/$$i \
 			    ../../../../usr/bin/${XDDIR}${OSREL}-$$i; \
 		done
+.else
+xdev xdev-build xdev-install:
+	@echo Both XDEV and XDEV_ARCH should be defined for ${.TARGET}
+	false
 .endif