--- Makefile	2021-03-15 10:38:37.789635000 +0200
+++ Makefile	2021-03-15 10:36:18.019171000 +0200
@@ -25,6 +25,16 @@ 
 PLIST_FILES=	sbin/yersinia \
 		man/man8/yersinia.8.gz
 
+OPTIONS_DEFINE=         PORTS_PCAP
+
+PORTS_PCAP_DESC=        Use ports PCAP instead of system PCAP
+
+PORTS_PCAP_CONFIGURE_ON=        --with-pcap-includes=${LOCALBASE}/include
+PORTS_PCAP_CONFIGURE_OFF=       --with-pcap-includes=/usr/include
+PORTS_PCAP_BUILD_DEPENDS=       ${LOCALBASE}/lib/libpcap.a:net/libpcap
+
+.include <bsd.port.options.mk>
+
 post-patch:
 	@${REINPLACE_CMD} -e 's,-O3 -Wall -g,${CFLAGS} -fcommon,' \
 		${WRKSRC}/configure.ac