diff --git a/math/py-chaospy/Makefile b/math/py-chaospy/Makefile
index 8e4731f5ed0a..5a47909fb809 100644
--- a/math/py-chaospy/Makefile
+++ b/math/py-chaospy/Makefile
@@ -1,33 +1,34 @@
 PORTNAME=	chaospy
 DISTVERSIONPREFIX=	v
 DISTVERSION=	4.3.11
 CATEGORIES=	math python
 #MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Toolbox for performing uncertainty quantification
 WWW=		https://github.com/jonathf/chaospy
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE.txt
 
-BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}wheel>0:devel/py-wheel@${PY_FLAVOR}
+BUILD_DEPENDS=	${PY_SETUPTOOLS} \
+		${PYTHON_PKGNAMEPREFIX}wheel>0:devel/py-wheel@${PY_FLAVOR}
 RUN_DEPENDS=	${PYNUMPY} \
 		${PYTHON_PKGNAMEPREFIX}matplotlib>0:math/py-matplotlib@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}numpoly>0:math/py-numpoly@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}scipy>0:science/py-scipy@${PY_FLAVOR}
 TEST_DEPENDS=	${PYTHON_PKGNAMEPREFIX}scikit-learn>0:science/py-scikit-learn@${PY_FLAVOR}
 
 USES=		python:3.6+
 USE_PYTHON=	pep517 autoplist pytest
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	jonathf
 
 NO_ARCH=	yes
 
 do-test: # tests hang: https://github.com/jonathf/chaospy/issues/406
 	@cd ${WRKSRC} && pytest --doctest-modules chaospy/
 
 .include <bsd.port.mk>