diff --git a/devel/py-build/Makefile b/devel/py-build/Makefile
index 3683ce2e25a7..9ed3a078e845 100644
--- a/devel/py-build/Makefile
+++ b/devel/py-build/Makefile
@@ -1,33 +1,38 @@
 PORTNAME=	build
 PORTVERSION=	1.2.1
 CATEGORIES=	devel python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	PEP517 package builder
 WWW=		https://build.pypa.io/en/stable/ \
 		https://github.com/pypa/build
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}packaging>=19.1:devel/py-packaging@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}pyproject_hooks>=0:devel/py-pyproject_hooks@${PY_FLAVOR} \
 		${PY_TOMLI}
 
 USES=		python
 USE_PYTHON=	allflavors autoplist concurrent pep517
 
 NO_ARCH=	yes
 
 PEP517_BUILD_CMD=	${PYTHON_CMD} -m flit_core.wheel
 PEP517_BUILD_DEPEND=	${PYTHON_PKGNAMEPREFIX}flit-core>=3.8:devel/py-flit-core@${PY_FLAVOR}
 
+#OPTIONS_DEFINE=	VIRTUALENV
+#VIRTUALENV_DESC=	Use virtualenv for isolation
+
+#VIRTUALENV_RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}virtualenv>=20.0.35:devel/py-virtualenv@${PY_FLAVOR}
+
 .include <bsd.port.pre.mk>
 
 #.if ${PYTHON_REL} < 31200
 #RUN_DEPENDS+=	${PYTHON_PKGNAMEPREFIX}importlib-metadata>=4.6:devel/py-importlib-metadata@${PY_FLAVOR}
 #.endif
 
 .include <bsd.port.post.mk>