diff --git a/devel/elixir-calendar/Makefile b/devel/elixir-calendar/Makefile
index 21ea0b470664..d04e2169f214 100644
--- a/devel/elixir-calendar/Makefile
+++ b/devel/elixir-calendar/Makefile
@@ -1,22 +1,24 @@
 PORTNAME=	calendar
 PORTVERSION=	0.17.4
 DISTVERSIONPREFIX=	v
 CATEGORIES=	devel
 PKGNAMEPREFIX=	elixir-
 
 MAINTAINER=	erlang@FreeBSD.org
 COMMENT=	Date-time and time zone handling in Elixir
 
 LICENSE=	MIT
 
+BROKEN=		does not build: Unchecked dependencies for environment prod: tzdata
+
 USES=		elixir
 USE_GITHUB=	yes
 GH_ACCOUNT=	lau
 
 MIX_BUILD_DEPS=	devel/elixir-tzdata
 MIX_RUN_DEPS:=	${MIX_BUILD_DEPS}
 MIX_REWRITE=	yes
 
 OPTIONS_DEFINE=	DOCS
 
 .include <bsd.port.mk>