diff --git a/build.config.mtk.aarch64 b/build.config.mtk.aarch64
index 3480c929e6c3..008f0c5fc24e 100644
--- a/build.config.mtk.aarch64
+++ b/build.config.mtk.aarch64
@@ -6,7 +6,7 @@ LD=ld.lld
 LD_LIBRARY_PATH=prebuilts/clang/host/linux-x86/clang-r370808/lib64:$$LD_LIBRARY_PATH
 NM=llvm-nm
 OBJCOPY=llvm-objcopy
-DEFCONFIG=defconfig
+# DEFCONFIG=defconfig
 KERNEL_DIR=kernel-4.14
 CLANG_PREBUILT_BIN=prebuilts/clang/host/linux-x86/clang-r370808/bin
 LINUX_GCC_CROSS_COMPILE_PREBUILTS_BIN=prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/bin
diff --git a/build.config.mtk.aarch64.gcc b/build.config.mtk.aarch64.gcc
index 721b3e9df09a..e5f0086b6e98 100644
--- a/build.config.mtk.aarch64.gcc
+++ b/build.config.mtk.aarch64.gcc
@@ -1,6 +1,6 @@
 ARCH=arm64
 CROSS_COMPILE=aarch64-linux-gnu-
 CC=gcc
-DEFCONFIG=defconfig
+# DEFCONFIG=defconfig
 KERNEL_DIR=kernel-4.14
 LINUX_GCC_CROSS_COMPILE_PREBUILTS_BIN=prebuilts/gcc/linux-x86/aarch64/aarch64-linux-gnu-6.3.1/bin
diff --git a/build.config.mtk.aarch64.kasan b/build.config.mtk.aarch64.kasan
index 721b3e9df09a..e5f0086b6e98 100644
--- a/build.config.mtk.aarch64.kasan
+++ b/build.config.mtk.aarch64.kasan
@@ -1,6 +1,6 @@
 ARCH=arm64
 CROSS_COMPILE=aarch64-linux-gnu-
 CC=gcc
-DEFCONFIG=defconfig
+# DEFCONFIG=defconfig
 KERNEL_DIR=kernel-4.14
 LINUX_GCC_CROSS_COMPILE_PREBUILTS_BIN=prebuilts/gcc/linux-x86/aarch64/aarch64-linux-gnu-6.3.1/bin
diff --git a/build.config.mtk.aarch64.ubsan b/build.config.mtk.aarch64.ubsan
index 721b3e9df09a..e5f0086b6e98 100644
--- a/build.config.mtk.aarch64.ubsan
+++ b/build.config.mtk.aarch64.ubsan
@@ -1,6 +1,6 @@
 ARCH=arm64
 CROSS_COMPILE=aarch64-linux-gnu-
 CC=gcc
-DEFCONFIG=defconfig
+# DEFCONFIG=defconfig
 KERNEL_DIR=kernel-4.14
 LINUX_GCC_CROSS_COMPILE_PREBUILTS_BIN=prebuilts/gcc/linux-x86/aarch64/aarch64-linux-gnu-6.3.1/bin
diff --git a/build.config.mtk.arm b/build.config.mtk.arm
index db51fc2c6aca..1c85ee1f8ff9 100644
--- a/build.config.mtk.arm
+++ b/build.config.mtk.arm
@@ -2,7 +2,7 @@ ARCH=arm
 CLANG_TRIPLE=arm-linux-gnueabi-
 CROSS_COMPILE=arm-linux-androidkernel-
 CC=clang
-DEFCONFIG=defconfig
+# DEFCONFIG=defconfig
 KERNEL_DIR=kernel-4.14
 CLANG_PREBUILT_BIN=prebuilts/clang/host/linux-x86/clang-r370808/bin
 LINUX_GCC_CROSS_COMPILE_PREBUILTS_BIN=prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.9/bin