diff -ruN --exclude=CVS /usr/ports/net/igmpproxy.orig/Makefile /usr/ports/net/igmpproxy/Makefile
--- /usr/ports/net/igmpproxy.orig/Makefile	2010-08-12 10:13:36.000000000 +0200
+++ /usr/ports/net/igmpproxy/Makefile	2010-08-12 10:26:18.000000000 +0200
@@ -24,8 +24,4 @@
 MAN5=		igmpproxy.conf.5
 MAN8=		igmpproxy.8
 
-PLIST_FILES=	sbin/igmpproxy \
-		etc/igmpproxy.conf \
-		etc/igmpproxy.conf.sample
-
 .include <bsd.port.mk>
diff -ruN --exclude=CVS /usr/ports/net/igmpproxy.orig/pkg-plist /usr/ports/net/igmpproxy/pkg-plist
--- /usr/ports/net/igmpproxy.orig/pkg-plist	1970-01-01 01:00:00.000000000 +0100
+++ /usr/ports/net/igmpproxy/pkg-plist	2010-08-12 10:22:53.000000000 +0200
@@ -0,0 +1,3 @@
+sbin/igmpproxy
+@unexec if cmp -s %D/etc/igmpproxy.conf.sample %D/etc/igmpproxy.conf; then rm -f %D/etc/igmpproxy.conf; fi
+etc/igmpproxy.conf.sample