diff --git a/finalize_branch_for_release.sh b/finalize_branch_for_release.sh
index c942eb2..12b096f 100755
--- a/finalize_branch_for_release.sh
+++ b/finalize_branch_for_release.sh
@@ -1,30 +1,34 @@
 #!/bin/bash
 
-set -e
+set -ex
 
-source "$(dirname "$0")"/envsetup.sh
+function finalize_main() {
+    local top="$(dirname "$0")"/../..
 
-# default target to modify tree and build SDK
-lunch aosp_arm64-userdebug
+    # 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"
 
-set -x
+    # This script is WIP and only finalizes part of the Android branch for release.
+    # The full process can be found at (INTERNAL) go/android-sdk-finalization.
 
-# This script is WIP and only finalizes part of the Android branch for release.
-# The full process can be found at (INTERNAL) go/android-sdk-finalization.
+    # VNDK snapshot (TODO)
+    # SDK snapshots (TODO)
+    # Update references in the codebase to new API version (TODO)
+    # ...
 
-# VNDK snapshot (TODO)
-# SDK snapshots (TODO)
-# Update references in the codebase to new API version (TODO)
-# ...
+    AIDL_TRANSITIVE_FREEZE=true $m aidl-freeze-api
 
-AIDL_TRANSITIVE_FREEZE=true m aidl-freeze-api
+    # Update new versions of files. See update-vndk-list.sh (which requires envsetup.sh)
+    $m check-vndk-list || \
+        { cp $top/out/soong/vndk/vndk.libraries.txt $top/build/make/target/product/gsi/current.txt; }
 
-m check-vndk-list || update-vndk-list.sh # for new versions of AIDL interfaces
+    # for now, we simulate the release state for AIDL, but in the future, we would want
+    # to actually turn the branch into the REL state and test with that
+    AIDL_FROZEN_REL=true $m nothing # test build
 
-# for now, we simulate the release state for AIDL, but in the future, we would want
-# to actually turn the branch into the REL state and test with that
-AIDL_FROZEN_REL=true m # test build
+    # Build SDK (TODO)
+    # lunch sdk...
+    # m ...
+}
 
-# Build SDK (TODO)
-# lunch sdk...
-# m ...
+finalize_main