Index: head/devel/py-virtualenv/Makefile
===================================================================
--- head/devel/py-virtualenv/Makefile	(revision 548290)
+++ head/devel/py-virtualenv/Makefile	(revision 548291)
@@ -1,51 +1,52 @@
 # $FreeBSD$
 
 PORTNAME=	virtualenv
 PORTVERSION=	16.7.5
 PORTREVISION=	0
 CATEGORIES=	devel python
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	nivit@FreeBSD.org
 COMMENT=	Tool for creating isolated Python environments
 
 LICENSE=	MIT
 
 TEST_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pytest>0:devel/py-pytest@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}mock>0:devel/py-mock@${PY_FLAVOR}
 
 DOCS_BUILD_DEPENDS=	${PY_SPHINX} \
 			${PYTHON_PKGNAMEPREFIX}sphinx_rtd_theme>0:textproc/py-sphinx_rtd_theme@${PY_FLAVOR} \
 			${PYTHON_PKGNAMEPREFIX}towncrier>0:textproc/py-towncrier@${PY_FLAVOR}
 .if ${FLAVOR:U:Mpy27}
 DOCS_BUILD_DEPENDS+=	${PYTHON_PKGNAMEPREFIX}pathlib2>0:devel/py-pathlib2@${PY_FLAVOR}
 .endif
+DOCS_BINARY_ALIAS=	towncrier=towncrier-${PYTHON_VER}
 DOCS_PORTDOCS=	*
 DOCS_VARS=	PYDISTUTILS_BUILD_TARGET="build build_sphinx"
 
 # Required by towncrier/click when Python < 3.7
 # see https://click.palletsprojects.com/en/7.x/python3/
 # Documentation is in English, so...
 MAKE_ENV=	LANG=en_US.UTF-8 LC_ALL=en_US.UTF-8
 
 GH_ACCOUNT=	pypa
 
 NO_ARCH=	yes
 
 OPTIONS_DEFINE=	DOCS
 
 PYDISTUTILS_BUILDARGS=	-c ${WRKSRC}/docs
 
 USES=		python
 USE_GITHUB=	yes
 USE_PYTHON=	autoplist concurrent distutils
 
 post-install-DOCS-on:
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	(cd ${WRKSRC}/build/sphinx/html && \
 	${COPYTREE_SHARE} . ${STAGEDIR}${DOCSDIR} "! -name .buildinfo -or -name objects.inv")
 
 regression-test: build
 	@cd ${WRKSRC} && ${PYTHON_CMD} ${PYDISTUTILS_SETUP} test
 
 .include <bsd.port.mk>