Index: www/rubygem-passenger/Makefile
===================================================================
--- www/rubygem-passenger/Makefile
+++ www/rubygem-passenger/Makefile
@@ -25,6 +25,10 @@
 apache_PKGNAMESUFFIX=	-apache
 nginx_PKGNAMESUFFIX=	-nginx
 
+.for f in ${FLAVORS:N${FLAVOR}}
+CONFLICTS_INSTALL+=	${PKGNAMEPREFIX}${PORTNAME}${${f}_PKGNAMESUFFIX}
+.endfor
+
 OPTIONS_DEFINE=	DEBUG SYMLINK
 OPTIONS_EXCLUDE=DOCS
 SYMLINK_DESC=	Create passenger symlink