per PR#4304 this script should do fine with an inherited PATH

lib/bumpversion

@@ -1,5 +1,5 @@
 #!/bin/sh
-#	$NetBSD: bumpversion,v 1.5 1997/10/09 14:36:17 lukem Exp $
+#	$NetBSD: bumpversion,v 1.6 1998/04/09 05:08:32 fair Exp $
 #
 # Copyright (c) 1993 Christopher G. Demetriou
 # All rights reserved.
@@ -30,9 +30,6 @@
 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
 
-PATH=/bin:/usr/bin
-export PATH
-
 while :
 	do case "$1" in
 		# -c says to create new shlib_version files