diff --git a/tools/finalization/build-step-1-and-2.sh b/tools/finalization/build-step-1-and-2.sh
new file mode 100755
index 0000000..eaaf0cd
--- /dev/null
+++ b/tools/finalization/build-step-1-and-2.sh
@@ -0,0 +1,23 @@
+#!/bin/bash
+
+set -ex
+
+function finalize_main_step12() {
+    local top="$(dirname "$0")"/../../../..
+    source $top/build/make/tools/finalization/environment.sh
+
+    # default target to modify tree and build SDK
+    local m="$top/build/soong/soong_ui.bash --make-mode TARGET_PRODUCT=aosp_arm64 TARGET_BUILD_VARIANT=userdebug"
+
+    # SDK codename -> int
+    source $top/build/make/tools/finalization/finalize-aidl-vndk-sdk-resources.sh
+
+    # Platform/Mainline SDKs build and move to prebuilts
+    source $top/build/make/tools/finalization/localonly-finalize-mainline-sdk.sh
+
+    # REL
+    source $top/build/make/tools/finalization/finalize-sdk-rel.sh
+}
+
+finalize_main_step12
+