diff --git a/frontend/dockerfile/dockerfile2llb/convert.go b/frontend/dockerfile/dockerfile2llb/convert.go
index fd0cd28c..cc591f43 100644
--- a/frontend/dockerfile/dockerfile2llb/convert.go
+++ b/frontend/dockerfile/dockerfile2llb/convert.go
@@ -212,7 +212,7 @@ func Dockerfile2LLB(ctx context.Context, dt []byte, opt ConvertOpt) (*llb.State,
 				eg.Go(func() error {
 					ref, err := reference.ParseNormalizedNamed(d.stage.BaseName)
 					if err != nil {
-						return err
+						return errors.Wrapf(err, "failed to parse stage name %q", d.stage.BaseName)
 					}
 					platform := d.platform
 					if platform == nil {