diff --git a/tools/gn2bp/Android.bp.swp b/tools/gn2bp/Android.bp.swp
index eb0f9dc..bb581d0 100644
--- a/tools/gn2bp/Android.bp.swp
+++ b/tools/gn2bp/Android.bp.swp
@@ -14,6 +14,8 @@
 //
 // This file is automatically generated by gen_android_bp. Do not edit.
 
+build = ["Android.extras.bp"]
+
 // GN: PACKAGE
 package {
     default_applicable_licenses: [
diff --git a/tools/gn2bp/gen_android_bp b/tools/gn2bp/gen_android_bp
index eb9064b..0a12238 100755
--- a/tools/gn2bp/gen_android_bp
+++ b/tools/gn2bp/gen_android_bp
@@ -45,6 +45,8 @@
     '//components/cronet/android:cronet_android_mainline',
 ]
 
+EXTRAS_ANDROID_BP_FILE = "Android.extras.bp"
+
 # Defines a custom init_rc argument to be applied to the corresponding output
 # blueprint target.
 target_initrc = {
@@ -1843,6 +1845,8 @@
 // limitations under the License.
 //
 // This file is automatically generated by %s. Do not edit.
+
+build = ["Android.extras.bp"]
 """ % (tool_name)
   ]
   blueprint.to_string(output)