diff --git a/lib/libprocstat/zfs/Makefile b/lib/libprocstat/zfs/Makefile
index 9200f024480a..a58f298c62ca 100644
--- a/lib/libprocstat/zfs/Makefile
+++ b/lib/libprocstat/zfs/Makefile
@@ -1,21 +1,21 @@
 # $FreeBSD$
 
-.PATH: ${.CURDIR}/..
+.PATH: ${.CURDIR:H}
 
 SRCS=	zfs.c
 OBJS=	zfs.o
 WARNS?=	1
 
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/compat/opensolaris
-CFLAGS+= -I${.CURDIR}/../../../cddl/compat/opensolaris/include
-CFLAGS+= -I${.CURDIR}/../../../cddl/compat/opensolaris/lib/libumem
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libzpool/common
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/common/zfs
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common/fs/zfs
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common/sys
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/head
-CFLAGS+= -I${.CURDIR}/..
+CFLAGS+= -I${SRCTOP}/sys/cddl/compat/opensolaris
+CFLAGS+= -I${SRCTOP}/cddl/compat/opensolaris/include
+CFLAGS+= -I${SRCTOP}/cddl/compat/opensolaris/lib/libumem
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzpool/common
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/common/zfs
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common/fs/zfs
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common/sys
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/head
+CFLAGS+= -I${.CURDIR:H}
 CFLAGS+= -DNEED_SOLARIS_BOOLEAN
 
 all: ${OBJS}