diff --git a/android/makevars.go b/android/makevars.go
index e73645f..b6bc14e 100644
--- a/android/makevars.go
+++ b/android/makevars.go
@@ -473,7 +473,7 @@
 
 # Values written by Soong to generate install rules that can be amended by Kati.
 
-
+EXTRA_INSTALL_ZIPS :=
 `)
 
 	preserveSymlinksFlag := "-d"
@@ -507,9 +507,12 @@
 		if extraFiles := install.extraFiles; extraFiles != nil {
 			fmt.Fprintf(buf, "\t( unzip -qDD -d '%s' '%s' 2>&1 | grep -v \"zipfile is empty\"; exit $${PIPESTATUS[0]} ) || \\\n", extraFiles.dir.String(), extraFiles.zip.String())
 			fmt.Fprintf(buf, "\t  ( code=$$?; if [ $$code -ne 0 -a $$code -ne 1 ]; then exit $$code; fi )\n")
+			fmt.Fprintf(buf, "EXTRA_INSTALL_ZIPS += %s:%s\n", extraFiles.dir.String(), extraFiles.zip.String())
 		}
+
 		fmt.Fprintln(buf)
 	}
+	fmt.Fprintf(buf, ".KATI_READONLY := EXTRA_INSTALL_ZIPS\n")
 
 	for _, symlink := range symlinks {
 		fmt.Fprintf(buf, "%s:", symlink.to.String())