diff --git a/bp2build/conversion.go b/bp2build/conversion.go
index 4d8b8a4..8ca13b8 100644
--- a/bp2build/conversion.go
+++ b/bp2build/conversion.go
@@ -32,7 +32,7 @@
 	files = append(files, newFile("apex_toolchain", GeneratedBuildFileName, "")) // Creates a //apex_toolchain package.
 	files = append(files, newFile("apex_toolchain", "constants.bzl", apex.BazelApexToolchainVars()))
 
-	files = append(files, newFile("metrics", "converted_modules.txt", strings.Join(metrics.convertedModules, "\n")))
+	files = append(files, newFile("metrics", "converted_modules.txt", strings.Join(metrics.Serialize().ConvertedModules, "\n")))
 
 	convertedModulePathMap, err := json.MarshalIndent(metrics.convertedModulePathMap, "", "\t")
 	if err != nil {
@@ -55,10 +55,6 @@
 	return files
 }
 
-func convertedModules(convertedModules []string) string {
-	return strings.Join(convertedModules, "\n")
-}
-
 func CreateBazelFiles(
 	cfg android.Config,
 	ruleShims map[string]RuleShim,