diff --git a/pkg/skaffold/build/buildpacks/logger.go b/pkg/skaffold/build/buildpacks/logger.go
index 394bcd83088..e816818dae5 100644
--- a/pkg/skaffold/build/buildpacks/logger.go
+++ b/pkg/skaffold/build/buildpacks/logger.go
@@ -40,6 +40,8 @@ func NewLogger(out io.Writer) logging.Logger {
 
 	l := logrus.New()
 	l.SetOutput(out)
+
+	// By default, logrus prefixes lines with 'INFO[XXX]'.
 	l.SetFormatter(new(plainFormatter))
 
 	return &logger{