Index: devel/py-libzfs/Makefile
===================================================================
--- devel/py-libzfs/Makefile
+++ devel/py-libzfs/Makefile
@@ -26,6 +26,7 @@
 USES=		python
 USE_PYTHON=	autoplist distutils cython
 
+CONFIGURE_ENV=	FREEBSD_SRC=${SRC_BASE}
 MAKE_ENV=	FREEBSD_SRC=${SRC_BASE}
 
 .include <bsd.port.options.mk>