diff --git a/Makefile.inc1 b/Makefile.inc1
index cebe4c446fbf..3c5e0188a813 100644
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -521,6 +521,8 @@ BMAKEENV=	INSTALL="sh ${.CURDIR}/tools/install.sh" \
 		MAKEFLAGS="-m ${.CURDIR}/tools/build/mk ${.MAKEFLAGS}"
 # need to keep this in sync with targets/pseudo/bootstrap-tools/Makefile
 BSARGS= 	DESTDIR= \
+		OBJTOP='${WORLDTMP}/obj-$${BWPHASE}' \
+		OBJROOT='$${OBJTOP}/' \
 		BOOTSTRAPPING=${OSRELDATE} \
 		BWPHASE=${.TARGET:C,^_,,} \
 		SSP_CFLAGS= \
@@ -531,7 +533,7 @@ BSARGS= 	DESTDIR= \
 		MK_LLDB=no MK_TESTS=no \
 		MK_INCLUDES=yes
 
-BMAKE=		MAKEOBJDIRPREFIX=${WORLDTMP} \
+BMAKE=		\
 		${BMAKEENV} ${MAKE} ${WORLD_FLAGS} -f Makefile.inc1 \
 		${BSARGS}
 
@@ -558,9 +560,11 @@ XMAKE=		${BMAKE} \
 KTMAKEENV=	INSTALL="sh ${.CURDIR}/tools/install.sh" \
 		PATH=${BPATH}:${PATH} \
 		WORLDTMP=${WORLDTMP}
-KTMAKE=		TOOLS_PREFIX=${WORLDTMP} MAKEOBJDIRPREFIX=${WORLDTMP} \
+KTMAKE=		TOOLS_PREFIX=${WORLDTMP} \
 		${KTMAKEENV} ${MAKE} ${WORLD_FLAGS} -f Makefile.inc1 \
 		DESTDIR= \
+		OBJTOP='${WORLDTMP}/obj-kernel-tools' \
+		OBJROOT='$${OBJTOP}/' \
 		BOOTSTRAPPING=${OSRELDATE} \
 		SSP_CFLAGS= \
 		MK_HTML=no -DNO_LINT MK_MAN=no \
diff --git a/Makefile.libcompat b/Makefile.libcompat
index 5ec84fd42ca2..5bb455d0178f 100644
--- a/Makefile.libcompat
+++ b/Makefile.libcompat
@@ -108,7 +108,8 @@ LIBCOMPATCXXFLAGS+=	-isystem ${LIBCOMPATTMP}/usr/include/c++/v1 -std=c++11 \
 
 # Yes, the flags are redundant.
 LIBCOMPATWMAKEENV+= \
-		MAKEOBJDIRPREFIX=${LIBCOMPAT_OBJTOP} \
+		OBJTOP=${LIBCOMPAT_OBJTOP} \
+		OBJROOT='$${OBJTOP}/' \
 		INSTALL="sh ${.CURDIR}/tools/install.sh" \
 		PATH=${TMPPATH} \
 		SYSROOT=${LIBCOMPATTMP} \
@@ -184,7 +185,8 @@ build${libcompat}: .PHONY
 	${_+_}cd ${.CURDIR}/${_dir}; \
 	    WORLDTMP=${WORLDTMP} \
 	    MAKEFLAGS="-m ${.CURDIR}/tools/build/mk ${.MAKEFLAGS}" \
-	    MAKEOBJDIRPREFIX=${LIBCOMPAT_OBJTOP} \
+	    OBJTOP=${LIBCOMPAT_OBJTOP} \
+	    OBJROOT='$${OBJTOP}/' \
 	    ${MAKE} SSP_CFLAGS= DESTDIR= \
 	    DIRPRFX=${_dir}/ -DNO_LINT -DNO_CPU_CFLAGS MK_WARNS=no MK_CTF=no \
 	    build-tools
diff --git a/targets/pseudo/bootstrap-tools/Makefile b/targets/pseudo/bootstrap-tools/Makefile
index 95f16f0530a8..6d5b18d99247 100644
--- a/targets/pseudo/bootstrap-tools/Makefile
+++ b/targets/pseudo/bootstrap-tools/Makefile
@@ -13,10 +13,10 @@ TARGET_MACHINE= host
 HOST_MACHINE!= uname -m
 HOST_MACHINE_ARCH!= uname -p
 BTOOLSDIR?= ${HOST_OBJTOP}/tools
+WORLDTMP= ${BTOOLSDIR}
 LEGACY_TOOLS?= ${BTOOLSDIR}/legacy
 
 BSENV= \
-	unset MAKEOBJDIR; MAKEOBJDIRPREFIX=${BTOOLSDIR} \
 	MAKESYSPATH=${SRCTOP}/tools/build/mk:${SRCTOP}/share/mk \
 	TARGET=${HOST_MACHINE} TARGET_ARCH=${HOST_MACHINE_ARCH} \
 	WITHOUT_STAGING=1 STAGE_ROOT= BOOTSTRAPPING_TOOLS=1 \
@@ -34,6 +34,8 @@ OSRELDATE?= 0
 
 # need to keep this in sync with src/Makefile.inc1 
 BSARGS= 	DESTDIR= \
+		OBJTOP='${WORLDTMP}/obj-$${BWPHASE}' \
+		OBJROOT='$${OBJTOP}/' \
 		BOOTSTRAPPING=${OSRELDATE} \
 		BWPHASE=${.TARGET} \
 		SSP_CFLAGS= \
@@ -44,8 +46,6 @@ BSARGS= 	DESTDIR= \
 		MK_LLDB=no MK_TESTS=no \
 		MK_INCLUDES=yes
 
-# Need to override these so OBJTOP uses are proper in the non-meta build.
-BSARGS+= OBJTOP=${BTOOLSDIR}${SRCTOP} OBJROOT='$${OBJTOP}/'
 # We will handle building the toolchain and cross-compiler.
 BSARGS+= MK_CROSS_COMPILER=no MK_CLANG=no MK_GCC=no