Index: head/devel/py-cffi/Makefile
===================================================================
--- head/devel/py-cffi/Makefile	(revision 420384)
+++ head/devel/py-cffi/Makefile	(revision 420385)
@@ -1,43 +1,43 @@
 # Created by: William Grzybowski <wg@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	cffi
 PORTVERSION=	1.7.0
 CATEGORIES=	devel python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	wg@FreeBSD.org
 COMMENT=	Foreign Function Interface for Python calling C code
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 LIB_DEPENDS=	libffi.so:devel/libffi
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pycparser>=2.10:devel/py-pycparser
 TEST_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pytest>0:devel/py-pytest
 
 # Actually 2.6-2.7,3.2-3.5
-USES=		python
+USES=		localbase python
 USE_PYTHON=	autoplist distutils
 
 .include <bsd.port.pre.mk>
 
-.if ${OSVERSION} >= 1100000
+.if ${OPSYS} == FreeBSD && ${OSVERSION} >= 1100000
 CFLAGS+=	-Wno-shift-negative-value
 .endif
 
 # Tests assume gcc, and fail on pure clang systems
 # Fixed in https://bitbucket.org/cffi/cffi/issues/271
 post-patch:
 	${REINPLACE_CMD} -e 's|gcc|${CC}|g' ${WRKSRC}/testing/cffi0/test_ownlib.py
 
 post-install:
 	${STRIP_CMD} ${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}/_cffi_backend.so
 
 do-test:
 	@(cd ${TEST_WRKSRC} && ${SETENV} ${MAKE_ENV} ${PYTHON_CMD} \
 		${PYDISTUTILS_SETUP} build_ext -i)
 	@(cd ${TEST_WRKSRC} && ${SETENV} ${TEST_ENV} ${PYTHON_CMD} -m pytest -rs)
 
 .include <bsd.port.post.mk>