diff --git a/meta-ast2400/conf/machine/include/ast2400.inc b/meta-ast2400/conf/machine/include/ast2400.inc
index 54a2ad6..0215a0d 100644
--- a/meta-ast2400/conf/machine/include/ast2400.inc
+++ b/meta-ast2400/conf/machine/include/ast2400.inc
@@ -14,4 +14,6 @@
 
 SERIAL_CONSOLES = "115200;ttyS4"
 
+MACHINEOVERRIDES .= ":ast2400"
+
 require conf/machine/include/tune-arm926ejs.inc
diff --git a/meta-ast2400/recipes-bsp/u-boot/u-boot-fw-utils_%.bbappend b/meta-ast2400/recipes-bsp/u-boot/u-boot-fw-utils_%.bbappend
index 070f389..375359e 100644
--- a/meta-ast2400/recipes-bsp/u-boot/u-boot-fw-utils_%.bbappend
+++ b/meta-ast2400/recipes-bsp/u-boot/u-boot-fw-utils_%.bbappend
@@ -1,8 +1,8 @@
-FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
+FILESEXTRAPATHS_prepend_ast2400 := "${THISDIR}/files:"
 
-SRC_URI += "file://fw_env.config"
+SRC_URI_append_ast2400 = " file://fw_env.config"
 
-do_install_append() {
+do_install_append_ast2400() {
     if [ -e ${WORKDIR}/fw_env.config ] ; then
         install -d ${D}${sysconfdir}
         install -m 644 ${WORKDIR}/fw_env.config ${D}${sysconfdir}/fw_env.config
diff --git a/meta-ast2400/recipes-bsp/u-boot/u-boot_%.bbappend b/meta-ast2400/recipes-bsp/u-boot/u-boot_%.bbappend
index ef6a709..e3cc9e2 100644
--- a/meta-ast2400/recipes-bsp/u-boot/u-boot_%.bbappend
+++ b/meta-ast2400/recipes-bsp/u-boot/u-boot_%.bbappend
@@ -1,3 +1,3 @@
-FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
+FILESEXTRAPATHS_prepend_ast2400 := "${THISDIR}/files:"
 
-SRC_URI += "file://fw_env.config"
+SRC_URI_append_ast2400 = " file://fw_env.config"
diff --git a/meta-ast2400/recipes-kernel/linux/linux-obmc_%.bbappend b/meta-ast2400/recipes-kernel/linux/linux-obmc_%.bbappend
index 6d7ae27..7b49ba1 100644
--- a/meta-ast2400/recipes-kernel/linux/linux-obmc_%.bbappend
+++ b/meta-ast2400/recipes-kernel/linux/linux-obmc_%.bbappend
@@ -1,2 +1,2 @@
-FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
-SRC_URI += "file://defconfig"
+FILESEXTRAPATHS_prepend_ast2400 := "${THISDIR}/${PN}:"
+SRC_URI_append_ast2400 = " file://defconfig"
diff --git a/meta-ast2500/conf/machine/include/ast2500.inc b/meta-ast2500/conf/machine/include/ast2500.inc
index 94e9a59..01f299c 100644
--- a/meta-ast2500/conf/machine/include/ast2500.inc
+++ b/meta-ast2500/conf/machine/include/ast2500.inc
@@ -14,4 +14,6 @@
 
 SERIAL_CONSOLES = "115200;ttyS4"
 
+MACHINEOVERRIDES .= ":ast2500"
+
 require conf/machine/include/arm/arch-armv6.inc
diff --git a/meta-ast2500/recipes-bsp/u-boot/u-boot-fw-utils_%.bbappend b/meta-ast2500/recipes-bsp/u-boot/u-boot-fw-utils_%.bbappend
index 070f389..ece33b0 100644
--- a/meta-ast2500/recipes-bsp/u-boot/u-boot-fw-utils_%.bbappend
+++ b/meta-ast2500/recipes-bsp/u-boot/u-boot-fw-utils_%.bbappend
@@ -1,8 +1,8 @@
-FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
+FILESEXTRAPATHS_prepend_ast2500 := "${THISDIR}/files:"
 
-SRC_URI += "file://fw_env.config"
+SRC_URI_append_ast2500 = " file://fw_env.config"
 
-do_install_append() {
+do_install_append_ast2500() {
     if [ -e ${WORKDIR}/fw_env.config ] ; then
         install -d ${D}${sysconfdir}
         install -m 644 ${WORKDIR}/fw_env.config ${D}${sysconfdir}/fw_env.config
diff --git a/meta-ast2500/recipes-bsp/u-boot/u-boot_%.bbappend b/meta-ast2500/recipes-bsp/u-boot/u-boot_%.bbappend
index ef6a709..f214b22 100644
--- a/meta-ast2500/recipes-bsp/u-boot/u-boot_%.bbappend
+++ b/meta-ast2500/recipes-bsp/u-boot/u-boot_%.bbappend
@@ -1,3 +1,3 @@
-FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
+FILESEXTRAPATHS_prepend_ast2500 := "${THISDIR}/files:"
 
-SRC_URI += "file://fw_env.config"
+SRC_URI_append_ast2500 = " file://fw_env.config"
diff --git a/meta-ast2500/recipes-kernel/linux/linux-obmc_%.bbappend b/meta-ast2500/recipes-kernel/linux/linux-obmc_%.bbappend
index 6d7ae27..ee9a010 100644
--- a/meta-ast2500/recipes-kernel/linux/linux-obmc_%.bbappend
+++ b/meta-ast2500/recipes-kernel/linux/linux-obmc_%.bbappend
@@ -1,2 +1,2 @@
-FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
-SRC_URI += "file://defconfig"
+FILESEXTRAPATHS_prepend_ast2500 := "${THISDIR}/${PN}:"
+SRC_URI_append_ast2500 = " file://defconfig"