Index: head/comms/mlan3/Makefile
===================================================================
--- head/comms/mlan3/Makefile
+++ head/comms/mlan3/Makefile
@@ -17,6 +17,8 @@
 USES=		dos2unix uidfix zip
 DOS2UNIX_GLOB=	*.c *.h
 
+CONFLICTS_INSTALL=	shells/fish
+
 post-patch:
 	@${REINPLACE_CMD} -e '/int main/s/short argc/int argc/' \
 		${WRKSRC}/apps/gethumd/gethumd.c ${WRKSRC}/apps/shaapp/shaapp.c
Index: head/shells/fish/Makefile
===================================================================
--- head/shells/fish/Makefile
+++ head/shells/fish/Makefile
@@ -17,6 +17,8 @@
 		localbase compiler:c++11-lang shebangfix
 SHEBANG_FILES=	share/tools/*.py share/tools/web_config/webconfig.py
 
+CONFLICTS_INSTALL=	comms/mlan3
+
 GNU_CONFIGURE=	yes
 
 CPE_VENDOR=	fishshell