Index: head/devel/oniguruma4/Makefile
===================================================================
--- head/devel/oniguruma4/Makefile
+++ head/devel/oniguruma4/Makefile
@@ -16,7 +16,7 @@
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 USES=		libtool
-CONFLICTS=	oniguruma-2.*
+CONFLICTS_INSTALL=	oniguruma[56]-.*
 GNU_CONFIGURE=	yes
 USE_LDCONFIG=	yes
 INSTALL_TARGET=	install-strip
Index: head/devel/oniguruma5/Makefile
===================================================================
--- head/devel/oniguruma5/Makefile
+++ head/devel/oniguruma5/Makefile
@@ -17,7 +17,7 @@
 
 OPTIONS_DEFINE=	DOCS EXAMPLES
 
-CONFLICTS=	oniguruma-2.*
+CONFLICTS_INSTALL=	oniguruma[46]-.*
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	kkos