diff --git a/release/release.sh b/release/release.sh
index 0d5ae73d203..18ec210b78f 100755
--- a/release/release.sh
+++ b/release/release.sh
@@ -350,9 +350,6 @@ chroot_build_release() {
 # chroot_arm_build_release(): Create arm SD card image.
 chroot_arm_build_release() {
 	load_target_env
-	MAKE_FLAGS="${MAKE_FLAGS} TARGET=${EMBEDDED_TARGET}"
-	MAKE_FLAGS="${MAKE_FLAGS} TARGET_ARCH=${EMBEDDED_TARGET_ARCH}"
-	eval chroot ${CHROOTDIR} make ${MAKE_FLAGS} -C /usr/src/release obj
 	case ${EMBEDDED_TARGET} in
 		arm|arm64)
 			if [ -e "${RELENGDIR}/tools/arm.subr" ]; then
@@ -363,11 +360,14 @@ chroot_arm_build_release() {
 			;;
 	esac
 	[ ! -z "${RELEASECONF}" ] && . "${RELEASECONF}"
-	WORLDDIR="$(eval chroot ${CHROOTDIR} make ${MAKE_FLAGS} -C /usr/src/release -V WORLDDIR)"
-	OBJDIR="$(eval chroot ${CHROOTDIR} make ${MAKE_FLAGS} -C /usr/src/release -V .OBJDIR)"
-	DESTDIR="${OBJDIR}/${KERNEL}"
-	IMGBASE="${CHROOTDIR}/${OBJDIR}/${KERNEL}.img"
-	OSRELEASE="$(eval chroot ${CHROOTDIR} make ${MAKE_FLAGS} -C /usr/src/release \
+	export MAKE_FLAGS="${MAKE_FLAGS} TARGET=${EMBEDDED_TARGET}"
+	export MAKE_FLAGS="${MAKE_FLAGS} TARGET_ARCH=${EMBEDDED_TARGET_ARCH}"
+	eval chroot ${CHROOTDIR} env WITH_UNIFIED_OBJDIR=1 make ${MAKE_FLAGS} -C /usr/src/release obj
+	export WORLDDIR="$(eval chroot ${CHROOTDIR} make ${MAKE_FLAGS} -C /usr/src/release -V WORLDDIR)"
+	export OBJDIR="$(eval chroot ${CHROOTDIR} env WITH_UNIFIED_OBJDIR=1 make ${MAKE_FLAGS} -C /usr/src/release -V .OBJDIR)"
+	export DESTDIR="${OBJDIR}/${KERNEL}"
+	export IMGBASE="${CHROOTDIR}/${OBJDIR}/${KERNEL}.img"
+	export OSRELEASE="$(eval chroot ${CHROOTDIR} make ${MAKE_FLAGS} -C /usr/src/release \
 		TARGET=${EMBEDDED_TARGET} TARGET_ARCH=${EMBEDDED_TARGET_ARCH} \
 		-V OSRELEASE)"
 	chroot ${CHROOTDIR} mkdir -p ${DESTDIR}