misc/veles: Disable Boost in msgpack

Follow devel/msgpack-cxx port disabling Boost.

misc/veles/Makefile

@@ -24,7 +24,7 @@ BUILD_DEPENDS=	msgpack-c>0:devel/msgpack-c \
 		${PY_DEPENDS}
 RUN_DEPENDS=	${PY_DEPENDS}
 
-USES=		cmake compiler localbase python:3.6+ qt:5 shebangfix # localbase is for boost headers included from the headers installed by msgpack-cxx
+USES=		cmake compiler python:3.6+ qt:5 shebangfix
 SHEBANG_GLOB=	*.py
 SHEBANG_FILES=	python/plugin python/proxy resources/install/postinst python/test_dis
 USE_GITHUB=	yes
@@ -36,6 +36,8 @@ CMAKE_ARGS=	-DFREEBSD_PYTHON_CMD:STRING=${PYTHON_CMD} \
 		-DFREEBSD_LLVM_VERSION:STDING=${LLVM_DEFAULT} \
 		-DFREEBSD_PYTHON_SITELIBDIR:STRING=${PYTHON_SITELIBDIR} \
 		-DMSGPACK_INCLUDE_PATH:STRING=${LOCALBASE}/include/mgpack
+CMAKE_OFF=	MSGPACK_USE_BOOST # this should work, but Veles doesn't use cmake scripts for msgpack
+CXXFLAGS+=	-DMSGPACK_NO_BOOST # workaround for the above
 
 .include <bsd.port.pre.mk>