diff --git a/devel/py-pykdtree/Makefile b/devel/py-pykdtree/Makefile
index c5fc51f43163..1e856c80a4dd 100644
--- a/devel/py-pykdtree/Makefile
+++ b/devel/py-pykdtree/Makefile
@@ -1,25 +1,27 @@
 PORTNAME=	pykdtree
 PORTVERSION=	1.3.10
 CATEGORIES=	devel python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Fast kd-tree implementation with OpenMP-enabled queries
 WWW=		https://github.com/storpipfugl/pykdtree
 
 LICENSE=	LGPL3
 LICENSE_FILE=	${WRKSRC}/LICENSE.txt
 
+BROKEN=	Backend subprocess exited when trying to invoke build_wheel
+
 BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}numpy>=0,1:math/py-numpy@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}setuptools>=0:devel/py-setuptools@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}wheel>=0:devel/py-wheel@${PY_FLAVOR}
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}numpy>=0,1:math/py-numpy@${PY_FLAVOR}
 
 USES=		python:3.9+
 USE_PYTHON=	autoplist concurrent cython pep517
 
 post-install:
 	${FIND} ${STAGEDIR}${PYTHON_SITELIBDIR} -name '*.so' -exec ${STRIP_CMD} {} +
 
 .include <bsd.port.mk>