diff -ruN /usr/ports.old/dns/knot/Makefile /usr/ports/dns/knot/Makefile
--- /usr/ports.old/dns/knot/Makefile	2015-07-01 09:40:56.524943930 +0000
+++ /usr/ports/dns/knot/Makefile	2015-07-01 17:30:38.503017846 +0000
@@ -6,6 +6,7 @@
 CATEGORIES=	dns ipv6
 MASTER_SITES=	https://secure.nic.cz/files/knot-dns/ \
 		http://dns-lab.com/downloads/knot-dns/
+PKGNAMESUFFIX=	1
 
 MAINTAINER=	freebsd@dns-lab.com
 COMMENT=	High performance authoritative-only DNS server