diff --git a/math/py-pytanque/Makefile b/math/py-pytanque/Makefile
index 6f8f2076632c..fb00cd8944fc 100644
--- a/math/py-pytanque/Makefile
+++ b/math/py-pytanque/Makefile
@@ -12,7 +12,12 @@ LICENSE=	BSD3CLAUSE
 
 BROKEN_riscv64=	ld: error: lto.tmp: cannot link object files with different floating-point ABI
 
-USES=		compiler:c++14-lang python
+BUILD_DEPENDS=	pybind11>0:devel/pybind11
+
+USES=		compiler:c++14-lang localbase python
 USE_PYTHON=	distutils autoplist
 
+post-extract:
+	${RM} -r ${WRKSRC}/third-party/pybind11
+
 .include <bsd.port.mk>