diff --git a/2.27.1/Android.bp b/2.27.1/Android.bp
index 1466182..df37fb7 100644
--- a/2.27.1/Android.bp
+++ b/2.27.1/Android.bp
@@ -1,5 +1,7 @@
 // This file is generated by cargo_embargo.
-// Do not modify this file as changes will be overridden on upgrade.
+// Do not modify this file after the first "rust_*" or "genrule" module
+// because the changes will be overridden on upgrade.
+// Content before the first "rust_*" or "genrule" module is preserved.
 
 package {
     default_applicable_licenses: [
@@ -25,7 +27,7 @@
     crate_name: "protobuf_codegen",
     cargo_env_compat: true,
     cargo_pkg_version: "2.27.1",
-    srcs: ["src/lib.rs"],
+    crate_root: "src/lib.rs",
     edition: "2015",
     rustlibs: ["libprotobuf_deprecated"],
 }
@@ -35,7 +37,7 @@
     crate_name: "protobuf_codegen",
     cargo_env_compat: true,
     cargo_pkg_version: "2.27.1",
-    srcs: ["src/lib.rs"],
+    crate_root: "src/lib.rs",
     test_suites: ["general-tests"],
     auto_gen_config: true,
     test_options: {
@@ -50,7 +52,7 @@
     crate_name: "protoc_gen_rust",
     cargo_env_compat: true,
     cargo_pkg_version: "2.27.1",
-    srcs: ["src/bin/protoc-gen-rust.rs"],
+    crate_root: "src/bin/protoc-gen-rust.rs",
     edition: "2015",
     rustlibs: [
         "libprotobuf_codegen_deprecated",