Index: lang/mono6.8/Makefile
===================================================================
--- lang/mono6.8/Makefile
+++ lang/mono6.8/Makefile
@@ -25,7 +25,7 @@
 		zip>=0:archivers/zip
 
 CONFLICTS_BUILD=	brotli
-CONFLICTS_INSTALL=	czmq-3* mono5.10 mono6.8
+CONFLICTS_INSTALL=	czmq-3* mono5.10 mono5.20
 
 USES=	autoreconf bison compiler:c11 cpe gmake iconv libtool \
 	pathfix perl5 python:3.6+ shebangfix tar:xz