@@ -15,6 +15,7 @@ import (

 	"github.com/moby/buildkit/solver/pb"

 	"github.com/moby/buildkit/util/network"

 	specs "github.com/opencontainers/runtime-spec/specs-go"

+	"github.com/sirupsen/logrus"

 )

 const networkName = "bridge"

@@ -100,10 +101,10 @@ func (iface *lnInterface) Set(s *specs.Spec) {

 func (iface *lnInterface) Close() error {

 	<-iface.ready

-	err := iface.sbx.Delete()

-	if iface.err != nil {

-		// iface.err takes precedence over cleanup errors

-		return iface.err

-	}

-	return err

+	go func() {

+		if err := iface.sbx.Delete(); err != nil {

+			logrus.Errorf("failed to delete builder network sandbox: %v", err)

+		}

+	}()

+	return iface.err

 }