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

 	"github.com/moby/buildkit/cache/metadata"

 	"github.com/moby/buildkit/cache/remotecache"

 	"github.com/moby/buildkit/control"

-	"github.com/moby/buildkit/executor/runcexecutor"

 	"github.com/moby/buildkit/exporter"

 	"github.com/moby/buildkit/frontend"

 	"github.com/moby/buildkit/frontend/dockerfile"

@@ -89,10 +88,7 @@ func newController(rt http.RoundTripper, opt Opt) (*control.Controller, error) {

 		return nil, err

 	}

-	exec, err := runcexecutor.New(runcexecutor.Opt{

-		Root:              filepath.Join(root, "executor"),

-		CommandCandidates: []string{"docker-runc", "runc"},

-	})

+	exec, err := newExecutor(root)

 	if err != nil {

 		return nil, err

 	}

new file mode 100644

@@ -0,0 +1,17 @@

+// +build !windows

+

+package buildkit

+

+import (

+	"path/filepath"

+

+	"github.com/moby/buildkit/executor"

+	"github.com/moby/buildkit/executor/runcexecutor"

+)

+

+func newExecutor(root string) (executor.Executor, error) {

+	return runcexecutor.New(runcexecutor.Opt{

+		Root:              filepath.Join(root, "executor"),

+		CommandCandidates: []string{"docker-runc", "runc"},

+	})

+}

new file mode 100644

@@ -0,0 +1,11 @@

+package buildkit

+

+import (

+	"errors"

+

+	"github.com/moby/buildkit/executor"

+)

+

+func newExecutor(_ string) (executor.Executor, error) {

+	return nil, errors.New("buildkit executor not implemented for windows")

+}