diff --git a/cddl/lib/drti/Makefile b/cddl/lib/drti/Makefile
index b62d2c22c91b..19cbd748d234 100644
--- a/cddl/lib/drti/Makefile
+++ b/cddl/lib/drti/Makefile
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-.PATH:		${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libdtrace/common
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/lib/libdtrace/common
 
 SRCS=		drti.c
 FILES=		${SRCS:R:S/$/.o/g}
@@ -12,8 +12,8 @@ CLEANFILES=	${FILES}
 # These FILES qualify as libraries for the purpose of LIBRARIES_ONLY.
 .undef LIBRARIES_ONLY
 
-CFLAGS+=	-I${.CURDIR}/../../../sys/cddl/compat/opensolaris \
-		-I${.CURDIR}/../../../cddl/compat/opensolaris/include \
+CFLAGS+=	-I${SRCTOP}/sys/cddl/compat/opensolaris \
+		-I${SRCTOP}/cddl/compat/opensolaris/include \
 		-I${OPENSOLARIS_USR_DISTDIR}/head \
 		-I${OPENSOLARIS_USR_DISTDIR}/lib/libctf/common \
 		-I${OPENSOLARIS_USR_DISTDIR}/lib/libdtrace/common \
diff --git a/cddl/lib/libavl/Makefile b/cddl/lib/libavl/Makefile
index 856d12c22082..5939a78c4e11 100644
--- a/cddl/lib/libavl/Makefile
+++ b/cddl/lib/libavl/Makefile
@@ -1,11 +1,11 @@
 # $FreeBSD$
 
-.PATH: ${.CURDIR}/../../../sys/cddl/contrib/opensolaris/common/avl
+.PATH: ${SRCTOP}/sys/cddl/contrib/opensolaris/common/avl
 
 LIB=	avl
 SRCS=	avl.c
 WARNS?=	3
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/compat/opensolaris
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common
+CFLAGS+= -I${SRCTOP}/sys/cddl/compat/opensolaris
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common
 
 .include <bsd.lib.mk>
diff --git a/cddl/lib/libctf/Makefile b/cddl/lib/libctf/Makefile
index e41ad3701941..ed7ebc5351de 100644
--- a/cddl/lib/libctf/Makefile
+++ b/cddl/lib/libctf/Makefile
@@ -1,8 +1,8 @@
 # $FreeBSD$
 
-.PATH:		${.CURDIR}/../../../cddl/contrib/opensolaris/common/ctf
-.PATH:		${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libctf/common
-.PATH:		${.CURDIR}/../../../sys/cddl/contrib/opensolaris/common/ctf
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/common/ctf
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/lib/libctf/common
+.PATH: ${SRCTOP}/sys/cddl/contrib/opensolaris/common/ctf
 
 LIB=		ctf
 SRCS=		ctf_create.c \
@@ -21,8 +21,8 @@ MAN=		ctf.5
 WARNS?=		2
 CFLAGS+=	-DCTF_OLD_VERSIONS
 
-CFLAGS+=	-I${.CURDIR}/../../../sys/cddl/compat/opensolaris \
-		-I${.CURDIR}/../../../cddl/compat/opensolaris/include \
+CFLAGS+=	-I${SRCTOP}/sys/cddl/compat/opensolaris \
+		-I${SRCTOP}/cddl/compat/opensolaris/include \
 		-I${OPENSOLARIS_USR_DISTDIR}/head \
 		-I${OPENSOLARIS_USR_DISTDIR}/common/ctf \
 		-I${OPENSOLARIS_USR_DISTDIR}/lib/libctf/common \
diff --git a/cddl/lib/libdtrace/Makefile b/cddl/lib/libdtrace/Makefile
index 17e1eb9bdf5c..d55c0d62a764 100644
--- a/cddl/lib/libdtrace/Makefile
+++ b/cddl/lib/libdtrace/Makefile
@@ -1,7 +1,7 @@
 # $FreeBSD$
 
-.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libdtrace/common
-.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libgen/common
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/lib/libdtrace/common
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/lib/libgen/common
 
 LIB=		dtrace
 SRCS=		dt_aggregate.c \
@@ -64,9 +64,9 @@ FILESMODE=	${NOBINMODE}
 WARNS?=		1
 
 CFLAGS+=	-I${.OBJDIR} -I${.CURDIR} \
-		-I${.CURDIR}/../../../sys/cddl/dev/dtrace/${MACHINE_ARCH} \
-		-I${.CURDIR}/../../../sys/cddl/compat/opensolaris \
-		-I${.CURDIR}/../../../cddl/compat/opensolaris/include \
+		-I${SRCTOP}/sys/cddl/dev/dtrace/${MACHINE_ARCH} \
+		-I${SRCTOP}/sys/cddl/compat/opensolaris \
+		-I${SRCTOP}/cddl/compat/opensolaris/include \
 		-I${OPENSOLARIS_USR_DISTDIR}/head \
 		-I${OPENSOLARIS_USR_DISTDIR}/lib/libctf/common \
 		-I${OPENSOLARIS_USR_DISTDIR}/lib/libdtrace/common \
@@ -76,33 +76,33 @@ CFLAGS+=	-I${.OBJDIR} -I${.CURDIR} \
 
 .if ${MACHINE_CPUARCH} == "aarch64"
 CFLAGS+=	-I${OPENSOLARIS_SYS_DISTDIR}/uts/aarch64
-.PATH:		${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libdtrace/aarch64
-.PATH:		${.CURDIR}/../../../sys/cddl/dev/dtrace/aarch64
+.PATH:		${SRCTOP}/cddl/contrib/opensolaris/lib/libdtrace/aarch64
+.PATH:		${SRCTOP}/sys/cddl/dev/dtrace/aarch64
 .elif ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
-CFLAGS+=	-I${.CURDIR}/../../../sys/cddl/dev/dtrace/x86
+CFLAGS+=	-I${SRCTOP}/sys/cddl/dev/dtrace/x86
 CFLAGS+=	-I${OPENSOLARIS_SYS_DISTDIR}/uts/intel -DDIS_MEM
-.PATH:		${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libdtrace/i386
-.PATH:		${.CURDIR}/../../../sys/cddl/dev/dtrace/${MACHINE_ARCH}
-.PATH:		${.CURDIR}/../../../sys/cddl/dev/dtrace/x86
+.PATH:		${SRCTOP}/cddl/contrib/opensolaris/lib/libdtrace/i386
+.PATH:		${SRCTOP}/sys/cddl/dev/dtrace/${MACHINE_ARCH}
+.PATH:		${SRCTOP}/sys/cddl/dev/dtrace/x86
 .elif ${MACHINE_CPUARCH} == "arm"
 CFLAGS+=	-I${OPENSOLARIS_SYS_DISTDIR}/uts/arm
-.PATH:		${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libdtrace/arm
-.PATH:		${.CURDIR}/../../../sys/cddl/dev/dtrace/arm
+.PATH:		${SRCTOP}/cddl/contrib/opensolaris/lib/libdtrace/arm
+.PATH:		${SRCTOP}/sys/cddl/dev/dtrace/arm
 .elif ${MACHINE_CPUARCH} == "mips"
 CFLAGS+=	-I${OPENSOLARIS_SYS_DISTDIR}/uts/mips
-.PATH:		${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libdtrace/mips
-.PATH:		${.CURDIR}/../../../sys/cddl/dev/dtrace/mips
+.PATH:		${SRCTOP}/cddl/contrib/opensolaris/lib/libdtrace/mips
+.PATH:		${SRCTOP}/sys/cddl/dev/dtrace/mips
 .elif ${MACHINE_CPUARCH} == "powerpc"
 CFLAGS+=	-I${OPENSOLARIS_SYS_DISTDIR}/uts/powerpc
-.PATH:		${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libdtrace/powerpc
-.PATH:		${.CURDIR}/../../../sys/cddl/dev/dtrace/powerpc
+.PATH:		${SRCTOP}/cddl/contrib/opensolaris/lib/libdtrace/powerpc
+.PATH:		${SRCTOP}/sys/cddl/dev/dtrace/powerpc
 .elif ${MACHINE_CPUARCH} == "riscv"
 CFLAGS+=	-I${OPENSOLARIS_SYS_DISTDIR}/uts/riscv
-.PATH:		${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libdtrace/riscv
-.PATH:		${.CURDIR}/../../../sys/cddl/dev/dtrace/riscv
+.PATH:		${SRCTOP}/cddl/contrib/opensolaris/lib/libdtrace/riscv
+.PATH:		${SRCTOP}/sys/cddl/dev/dtrace/riscv
 .elif ${MACHINE_CPUARCH} == "sparc64"
 CFLAGS+=	-I${OPENSOLARIS_SYS_DISTDIR}/uts/sparc
-.PATH:		${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libdtrace/sparc
+.PATH:		${SRCTOP}/cddl/contrib/opensolaris/lib/libdtrace/sparc
 .else
 # temporary hack
 CFLAGS+=	-I${OPENSOLARIS_SYS_DISTDIR}/uts/intel
diff --git a/cddl/lib/libnvpair/Makefile b/cddl/lib/libnvpair/Makefile
index aef3f0b392d5..3321e274e6cd 100644
--- a/cddl/lib/libnvpair/Makefile
+++ b/cddl/lib/libnvpair/Makefile
@@ -1,7 +1,7 @@
 # $FreeBSD$
 
-.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libnvpair
-.PATH: ${.CURDIR}/../../../sys/cddl/contrib/opensolaris/common/nvpair
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/lib/libnvpair
+.PATH: ${SRCTOP}/sys/cddl/contrib/opensolaris/common/nvpair
 
 LIB=	nvpair
 
@@ -13,18 +13,18 @@ SRCS=	libnvpair.c \
 	opensolaris_nvpair_alloc_fixed.c
 
 WARNS?=	1
-CFLAGS+= -I${.CURDIR}/../../../cddl/compat/opensolaris/include
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libzpool/common
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/compat/opensolaris
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common/fs/zfs
-CFLAGS+= -I${.CURDIR}/../../../sys
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/head
-CFLAGS+= -I${.CURDIR}/../../../cddl/compat/opensolaris/lib/libumem
+CFLAGS+= -I${SRCTOP}/cddl/compat/opensolaris/include
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzpool/common
+CFLAGS+= -I${SRCTOP}/sys/cddl/compat/opensolaris
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common/fs/zfs
+CFLAGS+= -I${SRCTOP}/sys
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/head
+CFLAGS+= -I${SRCTOP}/cddl/compat/opensolaris/lib/libumem
 
 # This library uses macros to define fprintf behavior for several object types
 # The compiler will see the non-string literal arguments to the fprintf calls and
-# omit warnings for them. Quiesce these warnings in contrib code: 
+# omit warnings for them. Quiesce these warnings in contrib code:
 #
 # cddl/contrib/opensolaris/lib/libnvpair/libnvpair.c:743:12: warning: format
 #   string is not a string literal (potentially insecure) [-Wformat-security]
diff --git a/cddl/lib/libumem/Makefile b/cddl/lib/libumem/Makefile
index 56005aa04bd8..39ed62f1cc4e 100644
--- a/cddl/lib/libumem/Makefile
+++ b/cddl/lib/libumem/Makefile
@@ -1,10 +1,10 @@
 # $FreeBSD$
 
-.PATH: ${.CURDIR}/../../../cddl/compat/opensolaris/lib/libumem
+.PATH: ${SRCTOP}/cddl/compat/opensolaris/lib/libumem
 
 LIB=	umem
 SRCS=	umem.c
 WARNS?=	3
-CFLAGS+= -I${.CURDIR}/../../../cddl/compat/opensolaris/lib/libumem
+CFLAGS+= -I${SRCTOP}/cddl/compat/opensolaris/lib/libumem
 
 .include <bsd.lib.mk>
diff --git a/cddl/lib/libuutil/Makefile b/cddl/lib/libuutil/Makefile
index 72a7a30f06b9..a5d9807b7a82 100644
--- a/cddl/lib/libuutil/Makefile
+++ b/cddl/lib/libuutil/Makefile
@@ -1,7 +1,7 @@
 # $FreeBSD$
 
-.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libuutil/common
-.PATH: ${.CURDIR}/../../../sys/cddl/contrib/opensolaris/common/avl
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/lib/libuutil/common
+.PATH: ${SRCTOP}/sys/cddl/contrib/opensolaris/common/avl
 
 LIB=	uutil
 SRCS=	avl.c \
@@ -17,10 +17,10 @@ SRCS=	avl.c \
 
 WARNS?=	1
 CFLAGS+= -DNATIVE_BUILD
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libuutil/common
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/compat/opensolaris
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/compat/opensolaris/include
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/head
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libuutil/common
+CFLAGS+= -I${SRCTOP}/sys/cddl/compat/opensolaris
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common
+CFLAGS+= -I${SRCTOP}/cddl/compat/opensolaris/include
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/head
 
 .include <bsd.lib.mk>
diff --git a/cddl/lib/libzfs/Makefile b/cddl/lib/libzfs/Makefile
index 9af967437cde..a13c50281cd8 100644
--- a/cddl/lib/libzfs/Makefile
+++ b/cddl/lib/libzfs/Makefile
@@ -1,9 +1,9 @@
 # $FreeBSD$
 
-.PATH: ${.CURDIR}/../../../cddl/compat/opensolaris/misc
-.PATH: ${.CURDIR}/../../../sys/cddl/contrib/opensolaris/common/zfs
-.PATH: ${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common/fs/zfs
-.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libzfs/common
+.PATH: ${SRCTOP}/cddl/compat/opensolaris/misc
+.PATH: ${SRCTOP}/sys/cddl/contrib/opensolaris/common/zfs
+.PATH: ${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common/fs/zfs
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/lib/libzfs/common
 
 LIB=	zfs
 LIBADD=	md pthread umem util uutil m avl bsdxml geom nvpair z zfs_core
@@ -39,20 +39,19 @@ SRCS+=	libzfs_changelist.c \
 WARNS?=	0
 CSTD=	c99
 CFLAGS+= -DZFS_NO_ACL
-CFLAGS+= -I${.CURDIR}/../../../sbin/mount
-CFLAGS+= -I${.CURDIR}/../../../cddl/lib/libumem
-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${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common/sys
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/head
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libnvpair
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libuutil/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libzfs/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libzfs_core/common
+CFLAGS+= -I${SRCTOP}/sbin/mount
+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${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common/sys
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/head
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libnvpair
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libuutil/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzfs/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzfs_core/common
 
 .include <bsd.lib.mk>
diff --git a/cddl/lib/libzfs_core/Makefile b/cddl/lib/libzfs_core/Makefile
index 12d06d92997e..0df1d0c8920b 100644
--- a/cddl/lib/libzfs_core/Makefile
+++ b/cddl/lib/libzfs_core/Makefile
@@ -1,10 +1,10 @@
 # $FreeBSD$
 
-.PATH: ${.CURDIR}/../../../cddl/compat/opensolaris/misc
-.PATH: ${.CURDIR}/../../../sys/cddl/contrib/opensolaris/common/zfs
-.PATH: ${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common/fs/zfs
-.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libzfs_core/common
-.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libzfs/common
+.PATH: ${SRCTOP}/cddl/compat/opensolaris/misc
+.PATH: ${SRCTOP}/sys/cddl/contrib/opensolaris/common/zfs
+.PATH: ${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common/fs/zfs
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/lib/libzfs_core/common
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/lib/libzfs/common
 
 LIB=	zfs_core
 LIBADD=	nvpair
@@ -18,20 +18,19 @@ SRCS+=	libzfs_compat.c
 WARNS?=	0
 CSTD=	c99
 CFLAGS+= -DZFS_NO_ACL
-CFLAGS+= -I${.CURDIR}/../../../sbin/mount
-CFLAGS+= -I${.CURDIR}/../../../cddl/lib/libumem
-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${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common/sys
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/head
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libnvpair
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libuutil/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libzfs_core/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libzfs/common
+CFLAGS+= -I${SRCTOP}/sbin/mount
+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${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common/sys
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/head
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libnvpair
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libuutil/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzfs_core/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzfs/common
 
 .include <bsd.lib.mk>
diff --git a/cddl/lib/libzpool/Makefile b/cddl/lib/libzpool/Makefile
index b305315ae39a..c0c741f454e8 100644
--- a/cddl/lib/libzpool/Makefile
+++ b/cddl/lib/libzpool/Makefile
@@ -1,28 +1,28 @@
 # $FreeBSD$
 
-.include "${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common/Makefile.files"
+.include "${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common/Makefile.files"
 
 # ZFS_COMMON_SRCS
-.PATH: ${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common/fs/zfs
+.PATH: ${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common/fs/zfs
 # ZFS_SHARED_SRCS
-.PATH: ${.CURDIR}/../../../sys/cddl/contrib/opensolaris/common/zfs
+.PATH: ${SRCTOP}/sys/cddl/contrib/opensolaris/common/zfs
 # KERNEL_SRCS
-.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libzpool/common
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/lib/libzpool/common
 # LIST_SRCS
-.PATH: ${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common/os
+.PATH: ${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common/os
 # ATOMIC_SRCS
-.if exists(${.CURDIR}/../../../sys/cddl/contrib/opensolaris/common/atomic/${MACHINE_ARCH}/opensolaris_atomic.S)
-.PATH: ${.CURDIR}/../../../sys/cddl/contrib/opensolaris/common/atomic/${MACHINE_ARCH}
+.if exists(${SRCTOP}/sys/cddl/contrib/opensolaris/common/atomic/${MACHINE_ARCH}/opensolaris_atomic.S)
+.PATH: ${SRCTOP}/sys/cddl/contrib/opensolaris/common/atomic/${MACHINE_ARCH}
 ATOMIC_SRCS=	opensolaris_atomic.S
 .if ${MACHINE_ARCH} != "sparc64"
 ACFLAGS+=	-Wa,--noexecstack
 .endif
 .else
-.PATH: ${.CURDIR}/../../../sys/cddl/compat/opensolaris/kern
+.PATH: ${SRCTOP}/sys/cddl/compat/opensolaris/kern
 ATOMIC_SRCS=	opensolaris_atomic.c
 .endif
 # UNICODE_SRCS
-.PATH: ${.CURDIR}/../../../sys/cddl/contrib/opensolaris/common/unicode
+.PATH: ${SRCTOP}/sys/cddl/contrib/opensolaris/common/unicode
 
 LIB=		zpool
 
@@ -37,24 +37,23 @@ SRCS=		${ZFS_COMMON_SRCS} ${ZFS_SHARED_SRCS} \
 		${UNICODE_SRCS}
 
 WARNS?=		0
-CFLAGS+=	-I${.CURDIR}/../../../sys/cddl/compat/opensolaris
-CFLAGS+=	-I${.CURDIR}/../../compat/opensolaris/include
-CFLAGS+=	-I${.CURDIR}/../../compat/opensolaris/lib/libumem
-CFLAGS+=	-I${.CURDIR}/../../contrib/opensolaris/lib/libzpool/common
-CFLAGS+=	-I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common/sys
-CFLAGS+=	-I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common/fs/zfs
-CFLAGS+=	-I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/common/zfs
-CFLAGS+=	-I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common
-CFLAGS+=	-I${.CURDIR}/../../contrib/opensolaris/head
-CFLAGS+=	-I${.CURDIR}/../../lib/libumem
-CFLAGS+=	-I${.CURDIR}/../../contrib/opensolaris/lib/libnvpair
+CFLAGS+=	-I${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/uts/common/sys
+CFLAGS+=	-I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common/fs/zfs
+CFLAGS+=	-I${SRCTOP}/sys/cddl/contrib/opensolaris/common/zfs
+CFLAGS+=	-I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common
+CFLAGS+=	-I${SRCTOP}/cddl/contrib/opensolaris/head
+CFLAGS+=	-I${SRCTOP}/cddl/contrib/opensolaris/lib/libnvpair
 # XXX: pthread doesn't have mutex_owned() equivalent, so we need to look
 #      into libthr private structures. That's sooo evil, but it's only for
 #      ZFS debugging tools needs.
 CFLAGS+=	-DWANTS_MUTEX_OWNED
-CFLAGS+=	-I${.CURDIR}/../../../lib/libpthread/thread
-CFLAGS+=	-I${.CURDIR}/../../../lib/libpthread/sys
-CFLAGS+=	-I${.CURDIR}/../../../lib/libthr/arch/${MACHINE_CPUARCH}/include
+CFLAGS+=	-I${SRCTOP}/lib/libpthread/thread
+CFLAGS+=	-I${SRCTOP}/lib/libpthread/sys
+CFLAGS+=	-I${SRCTOP}/lib/libthr/arch/${MACHINE_CPUARCH}/include
 
 LIBADD=		md pthread z nvpair avl umem
 
diff --git a/cddl/sbin/zfs/Makefile b/cddl/sbin/zfs/Makefile
index 8e9ceb32efa5..e0d6faa8d873 100644
--- a/cddl/sbin/zfs/Makefile
+++ b/cddl/sbin/zfs/Makefile
@@ -1,26 +1,26 @@
 # $FreeBSD$
 
-.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/cmd/zfs
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/cmd/zfs
 
 PROG=	zfs
 MAN=	zfs.8
 SRCS=	zfs_main.c zfs_iter.c
 
 WARNS?=	0
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libzpool/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/compat/opensolaris/include
-CFLAGS+= -I${.CURDIR}/../../../cddl/compat/opensolaris/lib/libumem
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/compat/opensolaris
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/head
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libuutil/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libzfs/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libzfs_core/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libumem/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libnvpair
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common/fs/zfs
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common/sys
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/common/zfs
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzpool/common
+CFLAGS+= -I${SRCTOP}/cddl/compat/opensolaris/include
+CFLAGS+= -I${SRCTOP}/cddl/compat/opensolaris/lib/libumem
+CFLAGS+= -I${SRCTOP}/sys/cddl/compat/opensolaris
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/head
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libuutil/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzfs/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzfs_core/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libumem/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libnvpair
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common/fs/zfs
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common/sys
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/common/zfs
 
 LIBADD=	jail nvpair uutil zfs_core zfs
 
diff --git a/cddl/sbin/zpool/Makefile b/cddl/sbin/zpool/Makefile
index f900e0d00d1b..723bb754503a 100644
--- a/cddl/sbin/zpool/Makefile
+++ b/cddl/sbin/zpool/Makefile
@@ -1,8 +1,8 @@
 # $FreeBSD$
 
-.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/cmd/zpool
-.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/cmd/stat/common
-.PATH: ${.CURDIR}/../../../sys/cddl/contrib/opensolaris/common/zfs
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/cmd/zpool
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/cmd/stat/common
+.PATH: ${SRCTOP}/sys/cddl/contrib/opensolaris/common/zfs
 
 PROG=	zpool
 MAN=	zpool.8 zpool-features.7
@@ -10,22 +10,22 @@ SRCS=	zpool_main.c zpool_vdev.c zpool_iter.c zpool_util.c zfs_comutil.c
 SRCS+=	timestamp.c
 
 WARNS?=	0
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libzpool/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/compat/opensolaris/include
-CFLAGS+= -I${.CURDIR}/../../../cddl/compat/opensolaris/lib/libumem
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/compat/opensolaris
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/head
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libuutil/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libumem/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libzfs/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libzfs_core/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libnvpair
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/common/zfs
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common/fs/zfs
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common/sys
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libzpool/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/cmd/stat/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzpool/common
+CFLAGS+= -I${SRCTOP}/cddl/compat/opensolaris/include
+CFLAGS+= -I${SRCTOP}/cddl/compat/opensolaris/lib/libumem
+CFLAGS+= -I${SRCTOP}/sys/cddl/compat/opensolaris
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/head
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libuutil/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libumem/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzfs/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzfs_core/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libnvpair
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/common/zfs
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common/fs/zfs
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common/sys
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzpool/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/cmd/stat/common
 
 LIBADD=	geom nvpair uutil zfs
 
diff --git a/cddl/usr.bin/ctfconvert/Makefile b/cddl/usr.bin/ctfconvert/Makefile
index b1dd8a231f81..ce4238145df2 100644
--- a/cddl/usr.bin/ctfconvert/Makefile
+++ b/cddl/usr.bin/ctfconvert/Makefile
@@ -1,7 +1,7 @@
 # $FreeBSD$
 
-.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/tools/ctf/common
-.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/tools/ctf/cvt
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/tools/ctf/common
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/tools/ctf/cvt
 
 PROG=		ctfconvert
 SRCS=		alist.c \
@@ -25,8 +25,8 @@ SRCS=		alist.c \
 		traverse.c \
 		util.c
 
-CFLAGS+=	-I${.CURDIR}/../../../sys/cddl/compat/opensolaris \
-		-I${.CURDIR}/../../../cddl/compat/opensolaris/include \
+CFLAGS+=	-I${SRCTOP}/sys/cddl/compat/opensolaris \
+		-I${SRCTOP}/cddl/compat/opensolaris/include \
 		-I${OPENSOLARIS_USR_DISTDIR} \
 		-I${OPENSOLARIS_SYS_DISTDIR} \
 		-I${OPENSOLARIS_USR_DISTDIR}/head \
diff --git a/cddl/usr.bin/ctfdump/Makefile b/cddl/usr.bin/ctfdump/Makefile
index 74adad254124..953acfd3abb8 100644
--- a/cddl/usr.bin/ctfdump/Makefile
+++ b/cddl/usr.bin/ctfdump/Makefile
@@ -1,7 +1,7 @@
 # $FreeBSD$
 
-.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/tools/ctf/common
-.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/tools/ctf/dump
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/tools/ctf/common
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/tools/ctf/dump
 
 PROG=		ctfdump
 SRCS=		dump.c \
@@ -12,8 +12,8 @@ CFLAGS+=	-I${OPENSOLARIS_USR_DISTDIR} \
 		-I${OPENSOLARIS_SYS_DISTDIR} \
 		-I${OPENSOLARIS_USR_DISTDIR}/head \
 		-I${OPENSOLARIS_USR_DISTDIR}/cmd/mdb/tools/common \
-		-I${.CURDIR}/../../../sys/cddl/compat/opensolaris \
-		-I${.CURDIR}/../../../cddl/compat/opensolaris/include \
+		-I${SRCTOP}/sys/cddl/compat/opensolaris \
+		-I${SRCTOP}/cddl/compat/opensolaris/include \
 		-I${OPENSOLARIS_USR_DISTDIR}/tools/ctf/common \
 		-I${OPENSOLARIS_SYS_DISTDIR}/uts/common
 
diff --git a/cddl/usr.bin/ctfmerge/Makefile b/cddl/usr.bin/ctfmerge/Makefile
index 86e8a0df78c1..c863ea0edf87 100644
--- a/cddl/usr.bin/ctfmerge/Makefile
+++ b/cddl/usr.bin/ctfmerge/Makefile
@@ -1,7 +1,7 @@
 # $FreeBSD$
 
-.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/tools/ctf/common
-.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/tools/ctf/cvt
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/tools/ctf/common
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/tools/ctf/cvt
 
 PROG=		ctfmerge
 SRCS=		alist.c \
@@ -24,8 +24,8 @@ SRCS=		alist.c \
 
 WARNS?=		1
 
-CFLAGS+=	-I${.CURDIR}/../../../sys/cddl/compat/opensolaris \
-		-I${.CURDIR}/../../../cddl/compat/opensolaris/include \
+CFLAGS+=	-I${SRCTOP}/sys/cddl/compat/opensolaris \
+		-I${SRCTOP}/cddl/compat/opensolaris/include \
 		-I${OPENSOLARIS_USR_DISTDIR} \
 		-I${OPENSOLARIS_SYS_DISTDIR} \
 		-I${OPENSOLARIS_USR_DISTDIR}/head \
diff --git a/cddl/usr.bin/zinject/Makefile b/cddl/usr.bin/zinject/Makefile
index 68ca78da54cf..1cc403fbbd1f 100644
--- a/cddl/usr.bin/zinject/Makefile
+++ b/cddl/usr.bin/zinject/Makefile
@@ -1,25 +1,24 @@
 # $FreeBSD$
 
-.PATH: ${.CURDIR}/../../contrib/opensolaris/cmd/zinject
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/cmd/zinject
 
 PROG=	zinject
 SRCS=	zinject.c translate.c
 MAN=
 
 WARNS?=	0
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/compat/opensolaris
-CFLAGS+= -I${.CURDIR}/../../compat/opensolaris/include
-CFLAGS+= -I${.CURDIR}/../../compat/opensolaris/lib/libumem
-CFLAGS+= -I${.CURDIR}/../../contrib/opensolaris/lib/libzfs/common
-CFLAGS+= -I${.CURDIR}/../../contrib/opensolaris/lib/libzfs_core/common
-CFLAGS+= -I${.CURDIR}/../../contrib/opensolaris/lib/libzpool/common
-CFLAGS+= -I${.CURDIR}/../../contrib/opensolaris/lib/libnvpair
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common/fs/zfs
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common/sys
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/common/zfs/
-CFLAGS+= -I${.CURDIR}/../../contrib/opensolaris/head
-CFLAGS+= -I${.CURDIR}/../../lib/libumem
+CFLAGS+= -I${SRCTOP}/sys/cddl/compat/opensolaris
+CFLAGS+= -I${SRCTOP}/cddl/compat/opensolaris/include
+CFLAGS+= -I${SRCTOP}/cddl/compat/opensolaris/lib/libumem
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzfs/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzfs_core/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzpool/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libnvpair
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common/fs/zfs
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common/sys
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/common/zfs/
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/head
 
 LIBADD=	geom m nvpair umem uutil zfs_core zfs zpool
 
diff --git a/cddl/usr.bin/zlook/Makefile b/cddl/usr.bin/zlook/Makefile
index eae2fd034537..e36be05e7b71 100644
--- a/cddl/usr.bin/zlook/Makefile
+++ b/cddl/usr.bin/zlook/Makefile
@@ -1,25 +1,12 @@
 # $FreeBSD$
 
-.PATH: ${.CURDIR}/../../contrib/opensolaris/cmd/zlook
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/cmd/zlook
 
 PROG=	zlook
 MAN=
 
 WARNS?=	0
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/compat/opensolaris
-#CFLAGS+= -I${.CURDIR}/../../compat/opensolaris/include
-#CFLAGS+= -I${.CURDIR}/../../compat/opensolaris/lib/libumem
-#CFLAGS+= -I${.CURDIR}/../../contrib/opensolaris/lib/libzfs/common
-#CFLAGS+= -I${.CURDIR}/../../contrib/opensolaris/lib/libzpool/common
-#CFLAGS+= -I${.CURDIR}/../../contrib/opensolaris/lib/libnvpair
-#CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common/fs/zfs
-#CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common/sys
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common
-#CFLAGS+= -I${.CURDIR}/../../contrib/opensolaris/head
-#CFLAGS+= -I${.CURDIR}/../../lib/libumem
-#
-#DPADD=	${LIBAVL} ${LIBGEOM} ${LIBM} ${LIBNVPAIR} ${LIBUMEM} ${LIBUUTIL} \
-#	${LIBZFS} ${LIBZPOOL}
-#LDADD=	-lavl -lgeom -lm -lnvpair -lumem -luutil -lzfs -lzpool
+CFLAGS+= -I${SRCTOP}/sys/cddl/compat/opensolaris
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common
 
 .include <bsd.prog.mk>
diff --git a/cddl/usr.bin/zstreamdump/Makefile b/cddl/usr.bin/zstreamdump/Makefile
index e6b7b90bd60c..d6b5e30972c8 100644
--- a/cddl/usr.bin/zstreamdump/Makefile
+++ b/cddl/usr.bin/zstreamdump/Makefile
@@ -1,22 +1,21 @@
 # $FreeBSD$
 
-.PATH: ${.CURDIR}/../..//contrib/opensolaris/cmd/zstreamdump
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/cmd/zstreamdump
 
 PROG=	zstreamdump
 MAN=	zstreamdump.1
 
 WARNS?=	0
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/compat/opensolaris
-CFLAGS+= -I${.CURDIR}/../../compat/opensolaris/include
-CFLAGS+= -I${.CURDIR}/../../compat/opensolaris/lib/libumem
-CFLAGS+= -I${.CURDIR}/../../contrib/opensolaris/lib/libzpool/common
-CFLAGS+= -I${.CURDIR}/../../contrib/opensolaris/lib/libnvpair
-CFLAGS+= -I${.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/sys
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common
-CFLAGS+= -I${.CURDIR}/../../contrib/opensolaris/head
-CFLAGS+= -I${.CURDIR}/../../lib/libumem
+CFLAGS+= -I${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}/cddl/contrib/opensolaris/lib/libnvpair
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/common/zfs
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common/fs/zfs
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common/sys
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/head
 
 LIBADD=	m nvpair umem zpool pthread z avl
 
diff --git a/cddl/usr.bin/ztest/Makefile b/cddl/usr.bin/ztest/Makefile
index 1b3430b13fc7..81f120a13116 100644
--- a/cddl/usr.bin/ztest/Makefile
+++ b/cddl/usr.bin/ztest/Makefile
@@ -1,22 +1,21 @@
 # $FreeBSD$
 
-.PATH: ${.CURDIR}/../..//contrib/opensolaris/cmd/ztest
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/cmd/ztest
 
 PROG=	ztest
 MAN=
 
 WARNS?=	0
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/compat/opensolaris
-CFLAGS+= -I${.CURDIR}/../../compat/opensolaris/include
-CFLAGS+= -I${.CURDIR}/../../compat/opensolaris/lib/libumem
-CFLAGS+= -I${.CURDIR}/../../contrib/opensolaris/lib/libzpool/common
-CFLAGS+= -I${.CURDIR}/../../contrib/opensolaris/lib/libnvpair
-CFLAGS+= -I${.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/sys
-CFLAGS+= -I${.CURDIR}/../../../sys/cddl/contrib/opensolaris/uts/common
-CFLAGS+= -I${.CURDIR}/../../contrib/opensolaris/head
-CFLAGS+= -I${.CURDIR}/../../lib/libumem
+CFLAGS+= -I${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}/cddl/contrib/opensolaris/lib/libnvpair
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/common/zfs
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common/fs/zfs
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common/sys
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/head
 
 LIBADD=	geom m nvpair umem zpool pthread avl zfs_core zfs uutil
 
diff --git a/cddl/usr.sbin/dtrace/Makefile b/cddl/usr.sbin/dtrace/Makefile
index ec41c60cb17c..501b7c14861a 100644
--- a/cddl/usr.sbin/dtrace/Makefile
+++ b/cddl/usr.sbin/dtrace/Makefile
@@ -2,7 +2,7 @@
 
 .include <src.opts.mk>
 
-.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/cmd/dtrace
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/cmd/dtrace
 
 PROG=		dtrace
 SRCS=		dtrace.c
@@ -10,8 +10,8 @@ BINDIR?=	/usr/sbin
 
 WARNS?=		1
 
-CFLAGS+=	-I${.CURDIR}/../../../sys/cddl/compat/opensolaris \
-		-I${.CURDIR}/../../../cddl/compat/opensolaris/include \
+CFLAGS+=	-I${SRCTOP}/sys/cddl/compat/opensolaris \
+		-I${SRCTOP}/cddl/compat/opensolaris/include \
 		-I${OPENSOLARIS_USR_DISTDIR}/head \
 		-I${OPENSOLARIS_USR_DISTDIR}/lib/libdtrace/common \
 		-I${OPENSOLARIS_USR_DISTDIR}/lib/libproc/common \
diff --git a/cddl/usr.sbin/lockstat/Makefile b/cddl/usr.sbin/lockstat/Makefile
index a4eb898e33de..3ffcc7049f35 100644
--- a/cddl/usr.sbin/lockstat/Makefile
+++ b/cddl/usr.sbin/lockstat/Makefile
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/cmd/lockstat
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/cmd/lockstat
 
 PROG=		lockstat
 SRCS=		lockstat.c sym.c
@@ -8,14 +8,14 @@ BINDIR?=	/usr/sbin
 
 WARNS?=		1
 
-CFLAGS+=	-I${.CURDIR}/../../../sys/cddl/compat/opensolaris \
-		-I${.CURDIR}/../../../cddl/compat/opensolaris/include \
+CFLAGS+=	-I${SRCTOP}/sys/cddl/compat/opensolaris \
+		-I${SRCTOP}/cddl/compat/opensolaris/include \
 		-I${OPENSOLARIS_USR_DISTDIR}/head \
 		-I${OPENSOLARIS_USR_DISTDIR}/lib/libdtrace/common \
 		-I${OPENSOLARIS_USR_DISTDIR}/lib/libproc/common \
 		-I${OPENSOLARIS_SYS_DISTDIR}/uts/common \
 		-I${OPENSOLARIS_SYS_DISTDIR}/compat \
-		-I${.CURDIR}/../../../sys
+		-I${SRCTOP}/sys
 
 CFLAGS+=	-DNEED_ERRLOC -g
 
diff --git a/cddl/usr.sbin/plockstat/Makefile b/cddl/usr.sbin/plockstat/Makefile
index fc10b5679890..cb263fb427a7 100644
--- a/cddl/usr.sbin/plockstat/Makefile
+++ b/cddl/usr.sbin/plockstat/Makefile
@@ -1,22 +1,22 @@
 # $FreeBSD$
 
-.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/cmd/plockstat
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/cmd/plockstat
 
 PROG=		plockstat
-SRCS=		plockstat.c 
+SRCS=		plockstat.c
 BINDIR?=	/usr/sbin
 
 WARNS?=		1
 
-CFLAGS+=	-I${.CURDIR}/../../../sys/cddl/compat/opensolaris \
-		-I${.CURDIR}/../../../cddl/compat/opensolaris/include \
+CFLAGS+=	-I${SRCTOP}/sys/cddl/compat/opensolaris \
+		-I${SRCTOP}/cddl/compat/opensolaris/include \
 		-I${OPENSOLARIS_USR_DISTDIR}/head \
 		-I${OPENSOLARIS_USR_DISTDIR}/lib/libdtrace/common \
 		-I${OPENSOLARIS_USR_DISTDIR}/lib/libproc/common \
 		-I${OPENSOLARIS_SYS_DISTDIR}/uts/common \
 		-I${OPENSOLARIS_SYS_DISTDIR}/compat \
-		-I${.CURDIR}/../../../cddl/lib/libdtrace \
-		-I${.CURDIR}/../../../sys
+		-I${SRCTOP}/cddl/lib/libdtrace \
+		-I${SRCTOP}/sys
 
 LIBADD=	dtrace proc
 
diff --git a/cddl/usr.sbin/zdb/Makefile b/cddl/usr.sbin/zdb/Makefile
index 94f0412e8df6..84b64e45c6b2 100644
--- a/cddl/usr.sbin/zdb/Makefile
+++ b/cddl/usr.sbin/zdb/Makefile
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/cmd/zdb
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/cmd/zdb
 
 PROG=	zdb
 MAN=	zdb.8
@@ -9,20 +9,19 @@ SRCS=	zdb.c zdb_il.c
 WARNS?=	0
 CSTD=	c99
 
-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/libnvpair
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libuutil/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libzfs/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libzfs_core/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libzpool/common
-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}/../../../sys/cddl/contrib/opensolaris/common/zfs
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/head
-CFLAGS+= -I${.CURDIR}/../../lib/libumem
+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/libnvpair
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libuutil/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzfs/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzfs_core/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzpool/common
+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}/sys/cddl/contrib/opensolaris/common/zfs
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/head
 
 LIBADD=	nvpair umem uutil zfs zpool
 
diff --git a/cddl/usr.sbin/zhack/Makefile b/cddl/usr.sbin/zhack/Makefile
index 2973e5c11016..72641c1b8efb 100644
--- a/cddl/usr.sbin/zhack/Makefile
+++ b/cddl/usr.sbin/zhack/Makefile
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/cmd/zhack
+.PATH: ${SRCTOP}/cddl/contrib/opensolaris/cmd/zhack
 
 PROG=	zhack
 MAN=
@@ -8,20 +8,19 @@ MAN=
 WARNS?=	0
 CSTD=	c99
 
-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/libnvpair
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libuutil/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libzfs/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libzfs_core/common
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libzpool/common
-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}/../../../sys/cddl/contrib/opensolaris/common/zfs
-CFLAGS+= -I${.CURDIR}/../../../cddl/contrib/opensolaris/head
-CFLAGS+= -I${.CURDIR}/../../lib/libumem
+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/libnvpair
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libuutil/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzfs/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzfs_core/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzpool/common
+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}/sys/cddl/contrib/opensolaris/common/zfs
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/head
 
 LIBADD=	nvpair zfs zpool