Index: head/devel/rubygem-coffee-rails-rails50/Makefile
===================================================================
--- head/devel/rubygem-coffee-rails-rails50/Makefile	(revision 509178)
+++ head/devel/rubygem-coffee-rails-rails50/Makefile	(revision 509179)
@@ -1,24 +1,27 @@
 # Created by: Johannes Meixner <johannes@perceivon.net>
 # $FreeBSD$
 
 PORTNAME=	coffee-rails
 PORTVERSION=	4.2.2
 CATEGORIES=	devel rubygems
 MASTER_SITES=	RG
 PKGNAMESUFFIX=	-rails50
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Coffee Script adapter for the Rails asset pipeline
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/MIT-LICENSE
 
 RUN_DEPENDS=	rubygem-coffee-script>=2.2.0:devel/rubygem-coffee-script \
 		rubygem-railties50>=4.0.0:www/rubygem-railties50
 
 USES=		gem
 USE_RUBY=	yes
 
 NO_ARCH=	yes
 
+# It requires Rails 5.2.0+ since 5.0.0.
+PORTSCOUT=	limit:^4\.
+
 .include <bsd.port.mk>