--- bootstrap.sh	(Asterisk 13.19)
+++ bootstrap.sh	(working copy)
@@ -20,4 +20,5 @@
 	OpenBSD*)
-		export AUTOCONF_VERSION=2.63
-		export AUTOMAKE_VERSION=1.9
+		# pkg_add autoconf%2.63 automake%1.9 metaauto
+		[ -z "$AUTOCONF_VERSION" ] && export AUTOCONF_VERSION=2.63
+		[ -z "$AUTOMAKE_VERSION" ] && export AUTOMAKE_VERSION=1.9
 		;;