Index: head/archivers/py-zstandard/Makefile
===================================================================
--- head/archivers/py-zstandard/Makefile	(revision 561239)
+++ head/archivers/py-zstandard/Makefile	(revision 561240)
@@ -1,27 +1,31 @@
 # $FreeBSD$
 
 PORTNAME=	zstandard
 DISTVERSION=	0.15.1
+PORTREVISION=	1
 CATEGORIES=	archivers python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Zstandard bindings for Python, a full-featured version
 
 LICENSE=	BSD2CLAUSE
 
 BROKEN_FreeBSD_11_powerpc64=	fails to build: cffi.error.CDefError: parse error
 BROKEN_FreeBSD_12_powerpc64=	fails to build: cffi.error.CDefError: parse error
 
 BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}cffi>=1.8.0:devel/py-cffi@${PY_FLAVOR}
 LIB_DEPENDS=	libzstd.so:archivers/zstd
 
 USES=		localbase python:3.6+
 USE_PYTHON=	distutils autoplist
-PYDISTUTILS_BUILDARGS=	--system-zstd
+#PYDISTUTILS_BUILDARGS=	--system-zstd # breaks in runtime due to version mismatch, keep disabled until this is fixed: https://github.com/indygreg/python-zstandard/issues/132
 
 post-install:
 	@cd ${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}/zstandard && ${STRIP_CMD} backend_c.so _cffi.so
+
+do-test: # runs the internal testsuite, tests are unreliable or faulty: https://github.com/indygreg/python-zstandard/issues/133
+	@cd ${INSTALL_WRKSRC} && ${SETENV} ${MAKE_ENV} ${PYTHON_CMD} ${PYDISTUTILS_SETUP} ${PYDISTUTILS_BUILDARGS} test
 
 .include <bsd.port.mk>