diff --git a/errors.go b/errors.go
index d1cf2d0..7e7eb42 100644
--- a/errors.go
+++ b/errors.go
@@ -13,11 +13,9 @@ var (
 	ErrUnknownEvent           = errors.New("containerd: unknown event type")
 
 	// Internal errors
-	errShutdown             = errors.New("containerd: supervisor is shutdown")
-	errRootNotAbs           = errors.New("containerd: rootfs path is not an absolute path")
-	errNoContainerForPid    = errors.New("containerd: pid not registered for any container")
-	errInvalidContainerType = errors.New("containerd: invalid container type for runtime")
-	errNotChildProcess      = errors.New("containerd: not a child process for container")
+	errShutdown          = errors.New("containerd: supervisor is shutdown")
+	errRootNotAbs        = errors.New("containerd: rootfs path is not an absolute path")
+	errNoContainerForPid = errors.New("containerd: pid not registered for any container")
 	// internal error where the handler will defer to another for the final response
 	//
 	// TODO: we could probably do a typed error with another error channel for this to make it
diff --git a/runtime_linux.go b/linux/linux.go
similarity index 99%
rename from runtime_linux.go
rename to linux/linux.go
index 5a3ad1a..e902fa6 100644
--- a/runtime_linux.go
+++ b/linux/linux.go
@@ -1,6 +1,6 @@
 // +build libcontainer
 
-package containerd
+package linux
 
 import (
 	"encoding/json"
@@ -254,7 +254,7 @@ func (c *libcontainerContainer) Processes() ([]runtime.Process, error) {
 
 func (c *libcontainerContainer) RemoveProcess(pid int) error {
 	if _, ok := c.additionalProcesses[pid]; !ok {
-		return errNotChildProcess
+		return runtime.ErrNotChildProcess
 	}
 	delete(c.additionalProcesses, pid)
 	return nil
@@ -312,7 +312,7 @@ func (r *libcontainerRuntime) Create(id, bundlePath string, stdio *runtime.Stdio
 func (r *libcontainerRuntime) StartProcess(ci runtime.Container, p specs.Process, stdio *runtime.Stdio) (runtime.Process, error) {
 	c, ok := ci.(*libcontainerContainer)
 	if !ok {
-		return nil, errInvalidContainerType
+		return nil, runtime.ErrInvalidContainerType
 	}
 	process, err := r.newProcess(p, stdio)
 	if err != nil {
diff --git a/runtime/runtime.go b/runtime/runtime.go
index 02c86db..0af71e9 100644
--- a/runtime/runtime.go
+++ b/runtime/runtime.go
@@ -1,6 +1,15 @@
 package runtime
 
-import "github.com/opencontainers/specs"
+import (
+	"errors"
+
+	"github.com/opencontainers/specs"
+)
+
+var (
+	ErrNotChildProcess      = errors.New("containerd: not a child process for container")
+	ErrInvalidContainerType = errors.New("containerd: invalid container type for runtime")
+)
 
 // runtime handles containers, containers handle their own actions.
 type Runtime interface {
diff --git a/supervisor.go b/supervisor.go
index 706d589..47da917 100644
--- a/supervisor.go
+++ b/supervisor.go
@@ -8,6 +8,7 @@ import (
 	"time"
 
 	"github.com/Sirupsen/logrus"
+	"github.com/docker/containerd/linux"
 	"github.com/docker/containerd/runtime"
 	"github.com/opencontainers/runc/libcontainer"
 )
@@ -18,7 +19,7 @@ func NewSupervisor(stateDir string, concurrency int) (*Supervisor, error) {
 		return nil, err
 	}
 	// register counters
-	r, err := NewRuntime(stateDir)
+	r, err := linux.NewRuntime(stateDir)
 	if err != nil {
 		return nil, err
 	}