diff --git a/build.config.allmodconfig.aarch64 b/build.config.allmodconfig.aarch64
index 863ab1caddab..2fbe380e030a 100644
--- a/build.config.allmodconfig.aarch64
+++ b/build.config.allmodconfig.aarch64
@@ -1,4 +1,4 @@
-. ${ROOT_DIR}/common/build.config.common
-. ${ROOT_DIR}/common/build.config.aarch64
-. ${ROOT_DIR}/common/build.config.allmodconfig
+. ${ROOT_DIR}/${KERNEL_DIR}/build.config.common
+. ${ROOT_DIR}/${KERNEL_DIR}/build.config.aarch64
+. ${ROOT_DIR}/${KERNEL_DIR}/build.config.allmodconfig
 
diff --git a/build.config.allmodconfig.arm b/build.config.allmodconfig.arm
index 5dd94819c871..e92744a9b518 100644
--- a/build.config.allmodconfig.arm
+++ b/build.config.allmodconfig.arm
@@ -1,4 +1,4 @@
-. ${ROOT_DIR}/common/build.config.common
-. ${ROOT_DIR}/common/build.config.arm
-. ${ROOT_DIR}/common/build.config.allmodconfig
+. ${ROOT_DIR}/${KERNEL_DIR}/build.config.common
+. ${ROOT_DIR}/${KERNEL_DIR}/build.config.arm
+. ${ROOT_DIR}/${KERNEL_DIR}/build.config.allmodconfig
 
diff --git a/build.config.allmodconfig.x86_64 b/build.config.allmodconfig.x86_64
index bedb3869d99b..f06b30c8426f 100644
--- a/build.config.allmodconfig.x86_64
+++ b/build.config.allmodconfig.x86_64
@@ -1,4 +1,4 @@
-. ${ROOT_DIR}/common/build.config.common
-. ${ROOT_DIR}/common/build.config.x86_64
-. ${ROOT_DIR}/common/build.config.allmodconfig
+. ${ROOT_DIR}/${KERNEL_DIR}/build.config.common
+. ${ROOT_DIR}/${KERNEL_DIR}/build.config.x86_64
+. ${ROOT_DIR}/${KERNEL_DIR}/build.config.allmodconfig
 
diff --git a/build.config.common b/build.config.common
index 0c20768c2301..1454d4c3c7c7 100644
--- a/build.config.common
+++ b/build.config.common
@@ -1,6 +1,5 @@
 BRANCH=android-4.19-stable
 KMI_GENERATION=0
-KERNEL_DIR=common
 
 CC=clang
 LD=ld.lld
diff --git a/build.config.gki-debug.aarch64 b/build.config.gki-debug.aarch64
index 58cee7a6362b..c1fe2f03a279 100644
--- a/build.config.gki-debug.aarch64
+++ b/build.config.gki-debug.aarch64
@@ -1,3 +1,3 @@
-. ${ROOT_DIR}/common/build.config.gki.aarch64
+. ${ROOT_DIR}/${KERNEL_DIR}/build.config.gki.aarch64
 TRIM_NONLISTED_KMI=""
 KMI_SYMBOL_LIST_STRICT_MODE=""
diff --git a/build.config.gki-debug.x86_64 b/build.config.gki-debug.x86_64
index 9ee51e7de18c..d89b7ad4e804 100644
--- a/build.config.gki-debug.x86_64
+++ b/build.config.gki-debug.x86_64
@@ -1,3 +1,3 @@
-. ${ROOT_DIR}/common/build.config.gki.x86_64
+. ${ROOT_DIR}/${KERNEL_DIR}/build.config.gki.x86_64
 TRIM_NONLISTED_KMI=""
 KMI_SYMBOL_LIST_STRICT_MODE=""
diff --git a/build.config.gki.aarch64 b/build.config.gki.aarch64
index 7353591fade5..b540900d0940 100644
--- a/build.config.gki.aarch64
+++ b/build.config.gki.aarch64
@@ -1,6 +1,6 @@
-. ${ROOT_DIR}/common/build.config.common
-. ${ROOT_DIR}/common/build.config.aarch64
-. ${ROOT_DIR}/common/build.config.gki
+. ${ROOT_DIR}/${KERNEL_DIR}/build.config.common
+. ${ROOT_DIR}/${KERNEL_DIR}/build.config.aarch64
+. ${ROOT_DIR}/${KERNEL_DIR}/build.config.gki
 
 ABI_DEFINITION=android/abi_gki_aarch64.xml
 KMI_SYMBOL_LIST=android/abi_gki_aarch64
diff --git a/build.config.gki.x86_64 b/build.config.gki.x86_64
index 627d1e1c27ab..0e04fc692df2 100644
--- a/build.config.gki.x86_64
+++ b/build.config.gki.x86_64
@@ -1,4 +1,4 @@
-. ${ROOT_DIR}/common/build.config.common
-. ${ROOT_DIR}/common/build.config.x86_64
-. ${ROOT_DIR}/common/build.config.gki
+. ${ROOT_DIR}/${KERNEL_DIR}/build.config.common
+. ${ROOT_DIR}/${KERNEL_DIR}/build.config.x86_64
+. ${ROOT_DIR}/${KERNEL_DIR}/build.config.gki
 
diff --git a/build.config.gki_kasan b/build.config.gki_kasan
index e682b0d490bd..b3273b10a01c 100644
--- a/build.config.gki_kasan
+++ b/build.config.gki_kasan
@@ -1,6 +1,5 @@
 DEFCONFIG=gki_defconfig
 POST_DEFCONFIG_CMDS="check_defconfig && update_kasan_config"
-KERNEL_DIR=common
 function update_kasan_config() {
     ${KERNEL_DIR}/scripts/config --file ${OUT_DIR}/.config \
          -e CONFIG_KASAN \
diff --git a/build.config.gki_kasan.aarch64 b/build.config.gki_kasan.aarch64
index 6277fd662863..9fd2560c45e8 100644
--- a/build.config.gki_kasan.aarch64
+++ b/build.config.gki_kasan.aarch64
@@ -1,4 +1,3 @@
-. ${ROOT_DIR}/common/build.config.common
-. ${ROOT_DIR}/common/build.config.aarch64
-. ${ROOT_DIR}/common/build.config.gki_kasan
-
+. ${ROOT_DIR}/${KERNEL_DIR}/build.config.common
+. ${ROOT_DIR}/${KERNEL_DIR}/build.config.aarch64
+. ${ROOT_DIR}/${KERNEL_DIR}/build.config.gki_kasan
diff --git a/build.config.gki_kasan.x86_64 b/build.config.gki_kasan.x86_64
index 6a379eceeb31..eec645805f39 100644
--- a/build.config.gki_kasan.x86_64
+++ b/build.config.gki_kasan.x86_64
@@ -1,4 +1,4 @@
-. ${ROOT_DIR}/common/build.config.common
-. ${ROOT_DIR}/common/build.config.x86_64
-. ${ROOT_DIR}/common/build.config.gki_kasan
+. ${ROOT_DIR}/${KERNEL_DIR}/build.config.common
+. ${ROOT_DIR}/${KERNEL_DIR}/build.config.x86_64
+. ${ROOT_DIR}/${KERNEL_DIR}/build.config.gki_kasan