Index: head/devel/py-libzfs/Makefile
===================================================================
--- head/devel/py-libzfs/Makefile	(revision 522894)
+++ head/devel/py-libzfs/Makefile	(revision 522895)
@@ -1,39 +1,39 @@
 # Created by: William Grzybowski <wg@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	libzfs
 PORTVERSION=	1.0.20191113
 CATEGORIES=	devel python
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	wg@FreeBSD.org
 COMMENT=	Python libzfs bindings
 
 LICENSE=	BSD2CLAUSE
 
 BROKEN_mips=		fails to build: libzfs.c: error: convert_for_assignment: incompatible type for argument 3 of zfs_path_to_zhandle
 BROKEN_mips64=		fails to build: libzfs.c: error: convert_for_assignment: incompatible type for argument 3 of zfs_path_to_zhandle
 BROKEN_FreeBSD_11_powerpc64=	fails to build: libzfs.c: error: convert_for_assignment: incompatible type for argument 3 of zfs_path_to_zhandle
 BROKEN_FreeBSD_12_powerpc64=	fails to build: libzfs.c: error: convert_for_assignment: incompatible type for argument 3 of zfs_path_to_zhandle
 
 RUN_DEPENDS=	${PY_ENUM34}
 
 USE_GITHUB=     yes
 GH_ACCOUNT=	freenas
 GH_PROJECT=	py-libzfs
 GH_TAGNAME=	2991805
 
 HAS_CONFIGURE=	yes
 USES=		python
 USE_PYTHON=	autoplist distutils cython
 
-CONFIGURE_ENV=	FREEBSD_SRC=${SRC_BASE}
-MAKE_ENV=	FREEBSD_SRC=${SRC_BASE}
+CONFIGURE_ENV=	freebsd_src=${SRC_BASE}
+MAKE_ENV=	freebsd_src=${SRC_BASE}
 
 .include <bsd.port.options.mk>
 
 .if !exists(${SRC_BASE}/sys/Makefile)
 IGNORE=	requires kernel source files in ${SRC_BASE}
 .endif
 
 .include <bsd.port.mk>