diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -2,6 +2,8 @@
 
 ***
 
+NOTE: Raspberry Vanilla `android-12.1` branch is no longer maintained. Consider using newer AOSP versions.
+
 ### How to build:
 
 1. Establish [Android build environment](https://source.android.com/setup/initializing) and install [repo](https://source.android.com/docs/setup/develop#installing-repo).