diff --git a/irc/nethirc/Makefile b/irc/nethirc/Makefile
index 60815a52c680..7f75dd93acde 100644
--- a/irc/nethirc/Makefile
+++ b/irc/nethirc/Makefile
@@ -17,6 +17,10 @@ COMMENT=	Perl-based irc client that uses Net::IRC
 .include <bsd.port.pre.mk>
 RUN_DEPENDS=	${SITE_PERL}/Net/IRC.pm:${PORTSDIR}/irc/p5-IRC
 
+.if ${OSVERSION} < 500000
+BROKEN=		"Does not build"
+.endif
+
 NO_BUILD=	yes
 USE_PERL5=	yes
 MAN1=		nethirc.1 nhirc.1
diff --git a/www/mod_frontpage/Makefile b/www/mod_frontpage/Makefile
index ea17ca1f5139..ad93f54838b3 100644
--- a/www/mod_frontpage/Makefile
+++ b/www/mod_frontpage/Makefile
@@ -24,6 +24,10 @@ FPSETPERM=	${FP_DIR}/set_default_perms.sh
 
 .include <bsd.port.pre.mk>
 
+.if ${OSVERSION} < 500000
+BROKEN=		"Does not build"
+.endif
+
 PKGMESSAGE=	pkg-message
 
 INSTALL_FILE=	${INSTALL} -c -m 555 -o bin -g bin