diff --git a/ui/build/soong.go b/ui/build/soong.go
index 6a93672..899ab5d 100644
--- a/ui/build/soong.go
+++ b/ui/build/soong.go
@@ -169,8 +169,11 @@
 	// This build generates <builddir>/build.ninja, which is used later by build/soong/ui/build/build.go#Build().
 	ninja("bootstrap", ".bootstrap/build.ninja")
 
-	soongBuildMetrics := loadSoongBuildMetrics(ctx, config)
-	logSoongBuildMetrics(ctx, soongBuildMetrics)
+	var soongBuildMetrics *soong_metrics_proto.SoongBuildMetrics
+	if shouldCollectBuildSoongMetrics(config) {
+		soongBuildMetrics := loadSoongBuildMetrics(ctx, config)
+		logSoongBuildMetrics(ctx, soongBuildMetrics)
+	}
 
 	distGzipFile(ctx, config, config.SoongNinjaFile(), "soong")
 
@@ -179,11 +182,16 @@
 		distGzipFile(ctx, config, config.SoongMakeVarsMk(), "soong")
 	}
 
-	if ctx.Metrics != nil {
+	if shouldCollectBuildSoongMetrics(config) && ctx.Metrics != nil {
 		ctx.Metrics.SetSoongBuildMetrics(soongBuildMetrics)
 	}
 }
 
+func shouldCollectBuildSoongMetrics(config Config) bool {
+	// Do not collect metrics protobuf if the soong_build binary ran as the bp2build converter.
+	return config.Environment().IsFalse("GENERATE_BAZEL_FILES")
+}
+
 func loadSoongBuildMetrics(ctx Context, config Config) *soong_metrics_proto.SoongBuildMetrics {
 	soongBuildMetricsFile := filepath.Join(config.OutDir(), "soong", "soong_build_metrics.pb")
 	buf, err := ioutil.ReadFile(soongBuildMetricsFile)