Index: zoneinfo/Makefile
===================================================================
--- zoneinfo/Makefile
+++ zoneinfo/Makefile
@@ -92,6 +92,13 @@
 install-zoneinfo: zonefiles
 .endif
 
+# Mark zonefiles as .PHONY if builddir is missing to force rebuild.
+# This handles the case where make clean removed builddir but meta mode
+# thinks zonefiles is up to date.
+.if exists(${.OBJDIR}/zonefiles) && !exists(${TZBUILDDIR})
+zonefiles: .PHONY
+.endif
+
 zonefiles: ${TDATA}
 	mkdir -p ${TZBUILDDIR}
 	(cd ${TZBUILDDIR}; mkdir -p ${TZBUILDSUBDIRS})