diff --git a/commands/build.go b/commands/build.go
index 91a5786a4ac7..f0bd44b791b9 100644
--- a/commands/build.go
+++ b/commands/build.go
@@ -466,7 +466,7 @@ func runControllerBuild(ctx context.Context, dockerCli command.Cli, opts *contro
 	if err != nil {
 		var be *controllererrors.BuildError
 		if errors.As(err, &be) {
-			ref = be.Ref
+			ref = be.SessionID
 			retErr = err
 			// We can proceed to monitor
 		} else {
diff --git a/monitor/commands/reload.go b/monitor/commands/reload.go
index 3479bb7c0639..eaf4d4038380 100644
--- a/monitor/commands/reload.go
+++ b/monitor/commands/reload.go
@@ -66,7 +66,7 @@ func (cm *ReloadCmd) Exec(ctx context.Context, args []string) error {
 	if err != nil {
 		var be *controllererrors.BuildError
 		if errors.As(err, &be) {
-			ref = be.Ref
+			ref = be.SessionID
 			resultUpdated = true
 		} else {
 			fmt.Printf("failed to reload: %v\n", err)