diff --git a/bp2build/metrics.go b/bp2build/metrics.go
index bd21629..d6e5cf3 100644
--- a/bp2build/metrics.go
+++ b/bp2build/metrics.go
@@ -148,11 +148,26 @@
 func (metrics *CodegenMetrics) AddEvent(event *bp2build_metrics_proto.Event) {
 	metrics.serialized.Events = append(metrics.serialized.Events, event)
 }
+
 func (metrics *CodegenMetrics) AddUnconvertedModule(moduleType string) {
 	metrics.serialized.UnconvertedModuleCount += 1
 	metrics.serialized.TotalModuleTypeCount[moduleType] += 1
 }
 
+func (metrics *CodegenMetrics) SetSymlinkCount(n uint64) {
+	if m := metrics.serialized.WorkspaceSymlinkCount; m != 0 {
+		fmt.Fprintf(os.Stderr, "unexpected non-zero workspaceSymlinkCount of %d", m)
+	}
+	metrics.serialized.WorkspaceSymlinkCount = n
+}
+
+func (metrics *CodegenMetrics) SetMkDirCount(n uint64) {
+	if m := metrics.serialized.WorkspaceMkDirCount; m != 0 {
+		fmt.Fprintf(os.Stderr, "unexpected non-zero workspaceDirCount of %d", m)
+	}
+	metrics.serialized.WorkspaceMkDirCount = n
+}
+
 func (metrics *CodegenMetrics) TotalModuleCount() uint64 {
 	return metrics.serialized.HandCraftedModuleCount +
 		metrics.serialized.GeneratedModuleCount +