Index: Makefile
===================================================================
--- Makefile.orig
+++ Makefile
@@ -357,6 +357,7 @@ date:		$(DATEOBJS)
 
 tzselect:	tzselect.ksh
 		sed \
+			-e 's|#! /bin/ksh|#! /bin/sh|g' \
 			-e 's|AWK=[^}]*|AWK=$(AWK)|g' \
 			-e 's|TZDIR=[^}]*|TZDIR=$(TZDIR)|' \
 			<$? >$@