Index: docker.io/buildkit/cmd/buildkitd/main_containerd_worker.go
===================================================================
--- docker.io.orig/buildkit/cmd/buildkitd/main_containerd_worker.go
+++ docker.io/buildkit/cmd/buildkitd/main_containerd_worker.go
@@ -11,7 +11,6 @@ import (
 	"strings"
 	"time"
 
-	runhcsoptions "github.com/Microsoft/hcsshim/cmd/containerd-shim-runhcs-v1/options"
 	ctd "github.com/containerd/containerd"
 	"github.com/containerd/containerd/defaults"
 	runtimeoptions "github.com/containerd/containerd/pkg/runtimeoptions/v1"
@@ -33,9 +32,6 @@ import (
 
 const (
 	defaultContainerdNamespace = "buildkit"
-
-	// runtimeRunhcsV1 is the runtime type for runhcs.
-	runtimeRunhcsV1 = "io.containerd.runhcs.v1"
 )
 
 func init() {
@@ -379,8 +375,6 @@ func getRuntimeOptionsType(t string) int
 	switch t {
 	case plugin.RuntimeRuncV2:
 		return &runcoptions.Options{}
-	case runtimeRunhcsV1:
-		return &runhcsoptions.Options{}
 	default:
 		return &runtimeoptions.Options{}
 	}