$OpenBSD$
look for guile interpreter as guile2.2
Index: guile/scripts/msgs-per-hour.scm
--- guile/scripts/msgs-per-hour.scm.orig
+++ guile/scripts/msgs-per-hour.scm
@@ -1,5 +1,5 @@
 #!/bin/sh
-exec guile -e main -s $0 $@
+exec guile2.2 -e main -s $0 $@
 !#
 ;;
 ;; Copyright (C) 2012-2013 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>