Index: head/sysutils/apache-mesos/Makefile
===================================================================
--- head/sysutils/apache-mesos/Makefile
+++ head/sysutils/apache-mesos/Makefile
@@ -2,6 +2,7 @@
 
 PORTNAME=	mesos
 PORTVERSION=	1.9.0
+PORTREVISION=	1
 CATEGORIES=	sysutils
 MASTER_SITES=	APACHE/mesos/${PORTVERSION}
 PKGNAMEPREFIX=	apache-
@@ -12,7 +13,6 @@
 LICENSE=	APACHE20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
-BROKEN=		fails to build
 IGNORE_FreeBSD_11=	does not build
 
 BUILD_DEPENDS=	boost-libs>0:devel/boost-libs \
Index: head/sysutils/apache-mesos/files/patch-3rdparty_libprocess_include_process_grpc.hpp
===================================================================
--- head/sysutils/apache-mesos/files/patch-3rdparty_libprocess_include_process_grpc.hpp
+++ head/sysutils/apache-mesos/files/patch-3rdparty_libprocess_include_process_grpc.hpp
@@ -0,0 +1,20 @@
+--- 3rdparty/libprocess/include/process/grpc.hpp.orig	2019-11-04 22:31:46 UTC
++++ 3rdparty/libprocess/include/process/grpc.hpp
+@@ -90,7 +90,7 @@ struct MethodTraits; // Undefined.
+ 
+ template <typename Stub, typename Request, typename Response>
+ struct MethodTraits<
+-    std::unique_ptr<::grpc::ClientAsyncResponseReader<Response>>(Stub::*)(
++    std::unique_ptr<::grpc_impl::ClientAsyncResponseReader<Response>>(Stub::*)(
+         ::grpc::ClientContext*,
+         const Request&,
+         ::grpc::CompletionQueue*)>
+@@ -235,7 +235,7 @@ class Runtime (public)
+           std::shared_ptr<Response> response(new Response());
+           std::shared_ptr<::grpc::Status> status(new ::grpc::Status());
+ 
+-          std::shared_ptr<::grpc::ClientAsyncResponseReader<Response>> reader =
++          std::shared_ptr<::grpc_impl::ClientAsyncResponseReader<Response>> reader =
+             (typename internal::MethodTraits<Method>::stub_type(
+                 connection.channel).*method)(context.get(), request, queue);
+