diff --git a/meta/classes/rootfs_deb.bbclass b/meta/classes/rootfs_deb.bbclass
index 9997996..f61608b 100644
--- a/meta/classes/rootfs_deb.bbclass
+++ b/meta/classes/rootfs_deb.bbclass
@@ -26,6 +26,9 @@ deb_package_getflag() {
 fakeroot rootfs_deb_do_rootfs () {
 	set +e
 
+	# Dir could be changed to symbolic link by previous image session.
+	[ -L ${IMAGE_ROOTFS}/var/lib/dpkg/alternatives ] && \
+		rm ${IMAGE_ROOTFS}/var/lib/dpkg/alternatives
 	mkdir -p ${IMAGE_ROOTFS}/var/lib/dpkg/alternatives
 
 	# update index
@@ -85,9 +88,9 @@ fakeroot rootfs_deb_do_rootfs () {
 	if [ -e ${IMAGE_ROOTFS}/var/lib/dpkg/alternatives ]; then
 		rmdir ${IMAGE_ROOTFS}/var/lib/dpkg/alternatives
 	fi
-	ln -s ${opkglibdir}/alternatives ${IMAGE_ROOTFS}/var/lib/dpkg/alternatives
-	ln -s /var/lib/dpkg/info ${IMAGE_ROOTFS}${opkglibdir}/info
-	ln -s /var/lib/dpkg/status ${IMAGE_ROOTFS}${opkglibdir}/status
+	ln -sf ${opkglibdir}/alternatives ${IMAGE_ROOTFS}/var/lib/dpkg/alternatives
+	ln -sfn /var/lib/dpkg/info ${IMAGE_ROOTFS}${opkglibdir}/info
+	ln -sfn /var/lib/dpkg/status ${IMAGE_ROOTFS}${opkglibdir}/status
 
 	${ROOTFS_POSTPROCESS_COMMAND}
 
@@ -126,9 +129,52 @@ rootfs_list_installed_depends() {
 	${DPKG_QUERY_COMMAND} -W -f='Package: ${Package}\nDepends: ${Depends}\nRecommends: ${Recommends}\n\n' | opkg-query-helper.py
 }
 
+
+#
+# Install deb packages
+#
+# $1-- the list of package names that will be installed
 rootfs_install_packages() {
-	${STAGING_BINDIR_NATIVE}/apt-get install `cat $1` --force-yes --allow-unauthenticated
 
-	# Mark all packages installed
-	sed -i -e "s/Status: install ok unpacked/Status: install ok installed/;" $INSTALL_ROOTFS_DEB/var/lib/dpkg/status
+	# The pkgs_installed_manifest is used to list the package's names which
+	# are installed in the previous deb image.
+	local pkgs_installed_manifest="${T}/installed_$(basename $1)"
+
+	# The pkgs_solution_manifest is used to list the package's names which
+	# should be installed just right now.
+	local pkgs_solution_manifest="$1"
+
+	sort -u $pkgs_solution_manifest -o $pkgs_solution_manifest
+
+	# The deb incremental generation base on the previous image
+	if [ "${INC_DEB_IMAGE_GEN}" = "1" -a -e $pkgs_installed_manifest ]; then
+		# Remove unused deb packages by comparing the two manifests.
+		package_remove_unused_deb "$pkgs_solution_manifest" "$pkgs_installed_manifest"
+
+		# Reinstall updated packages by comparing the two manifests.
+		package_reinstall_updated_deb "$pkgs_solution_manifest" "$pkgs_installed_manifest"
+	fi
+
+	# Install packages by the names which pkgs_solution_manifest lists
+	local all_package_list=$(cat $pkgs_solution_manifest)
+	for i in $all_package_list; do
+		echo "NOTE: Installing $i"
+		apt-get install $i --force-yes --allow-unauthenticated
+		if [ $? -ne 0 ]; then
+			echo "ERROR: Install $i failed"
+			exit 1
+		fi
+	done
+
+	# Update installed manifest for next image session.
+	cp $pkgs_solution_manifest $pkgs_installed_manifest
+
+	# Mark all packages installed and remove Config-version
+	sed -i -e "s/Status: install ok unpacked/Status: install ok installed/;" \
+		-e "/^Config-Version:/d" $INSTALL_ROOTFS_DEB/var/lib/dpkg/status
+
+	# Back up dpkg database for the next image session.
+	local dpkg_dir="${T}/dpkg${INSTALL_ROOTFS_DEB}"
+	mkdir -p $dpkg_dir
+	cp -rf ${INSTALL_ROOTFS_DEB}/var/lib/dpkg/* $dpkg_dir
 }