diff --git a/drivers/hyperv/hyperv.go b/drivers/hyperv/hyperv.go
index bd7235d9..fc296f4f 100644
--- a/drivers/hyperv/hyperv.go
+++ b/drivers/hyperv/hyperv.go
@@ -6,8 +6,6 @@ import (
 	"os"
 	"time"
 
-	"errors"
-
 	"github.com/docker/machine/libmachine/drivers"
 	"github.com/docker/machine/libmachine/log"
 	"github.com/docker/machine/libmachine/mcnflag"
@@ -94,9 +92,6 @@ func (d *Driver) GetCreateFlags() []mcnflag.Flag {
 }
 
 func (d *Driver) SetConfigFromFlags(flags drivers.DriverOptions) error {
-	if drivers.EngineInstallURLFlagSet(flags) {
-		return errors.New("--engine-install-url cannot be used with the hyperv driver, use --hyperv-boot2docker-url instead")
-	}
 	d.Boot2DockerURL = flags.String("hyperv-boot2docker-url")
 	d.VSwitch = flags.String("hyperv-virtual-switch")
 	d.DiskSize = flags.Int("hyperv-disk-size")
diff --git a/drivers/virtualbox/virtualbox.go b/drivers/virtualbox/virtualbox.go
index 0313e5d6..a7b998b6 100644
--- a/drivers/virtualbox/virtualbox.go
+++ b/drivers/virtualbox/virtualbox.go
@@ -228,9 +228,6 @@ func (d *Driver) GetURL() (string, error) {
 }
 
 func (d *Driver) SetConfigFromFlags(flags drivers.DriverOptions) error {
-	if drivers.EngineInstallURLFlagSet(flags) {
-		return errors.New("--engine-install-url cannot be used with the virtualbox driver, use --virtualbox-boot2docker-url instead")
-	}
 	d.CPU = flags.Int("virtualbox-cpu-count")
 	d.Memory = flags.Int("virtualbox-memory")
 	d.DiskSize = flags.Int("virtualbox-disk-size")
diff --git a/drivers/vmwarefusion/fusion_darwin.go b/drivers/vmwarefusion/fusion_darwin.go
index d1e62f88..c56f5330 100644
--- a/drivers/vmwarefusion/fusion_darwin.go
+++ b/drivers/vmwarefusion/fusion_darwin.go
@@ -18,8 +18,6 @@ import (
 	"text/template"
 	"time"
 
-	"errors"
-
 	"github.com/docker/machine/libmachine/drivers"
 	"github.com/docker/machine/libmachine/log"
 	"github.com/docker/machine/libmachine/mcnflag"
@@ -145,9 +143,6 @@ func (d *Driver) DriverName() string {
 }
 
 func (d *Driver) SetConfigFromFlags(flags drivers.DriverOptions) error {
-	if drivers.EngineInstallURLFlagSet(flags) {
-		return errors.New("--engine-install-url cannot be used with the vmwarefusion driver, use --vmwarefusion-boot2docker-url instead")
-	}
 	d.Memory = flags.Int("vmwarefusion-memory-size")
 	d.CPU = flags.Int("vmwarefusion-cpu-count")
 	d.DiskSize = flags.Int("vmwarefusion-disk-size")
diff --git a/drivers/vmwarevsphere/vsphere.go b/drivers/vmwarevsphere/vsphere.go
index 1a8864df..ff532f2a 100644
--- a/drivers/vmwarevsphere/vsphere.go
+++ b/drivers/vmwarevsphere/vsphere.go
@@ -183,9 +183,6 @@ func (d *Driver) DriverName() string {
 }
 
 func (d *Driver) SetConfigFromFlags(flags drivers.DriverOptions) error {
-	if drivers.EngineInstallURLFlagSet(flags) {
-		return errors.New("--engine-install-url cannot be used with the vmwarevsphere driver, use --vmwarevsphere-boot2docker-url instead")
-	}
 	d.SSHUser = "docker"
 	d.SSHPort = 22
 	d.CPU = flags.Int("vmwarevsphere-cpu-count")
diff --git a/libmachine/drivers/base.go b/libmachine/drivers/base.go
index 040ea2a3..4ed06643 100644
--- a/libmachine/drivers/base.go
+++ b/libmachine/drivers/base.go
@@ -86,6 +86,9 @@ func (d *BaseDriver) SetSwarmConfigFromFlags(flags DriverOptions) {
 }
 
 func EngineInstallURLFlagSet(flags DriverOptions) bool {
-	engineInstallURLFlag := flags.String("engine-install-url")
-	return engineInstallURLFlag != DefaultEngineInstallURL && engineInstallURLFlag != ""
+	return EngineInstallURLSet(flags.String("engine-install-url"))
+}
+
+func EngineInstallURLSet(url string) bool {
+	return url != DefaultEngineInstallURL && url != ""
 }
diff --git a/libmachine/provision/rancheros.go b/libmachine/provision/rancheros.go
index 1ff47853..97557c26 100644
--- a/libmachine/provision/rancheros.go
+++ b/libmachine/provision/rancheros.go
@@ -93,6 +93,8 @@ func (provisioner *RancherProvisioner) Package(name string, action pkgaction.Pac
 }
 
 func (provisioner *RancherProvisioner) Provision(swarmOptions swarm.Options, authOptions auth.Options, engineOptions engine.Options) error {
+	log.Debugf("Running RancherOS provisioner on %s", provisioner.Driver.GetMachineName())
+
 	provisioner.SwarmOptions = swarmOptions
 	provisioner.AuthOptions = authOptions
 	provisioner.EngineOptions = engineOptions
@@ -116,6 +118,11 @@ func (provisioner *RancherProvisioner) Provision(swarmOptions swarm.Options, aut
 		}
 	}
 
+	log.Debugf("Selecting docker engine: %s", engineOptions.InstallURL)
+	if err := selectDocker(provisioner, engineOptions.InstallURL); err != nil {
+		return err
+	}
+
 	log.Debugf("Preparing certificates")
 	provisioner.AuthOptions = setRemoteAuthOptions(provisioner)
 
@@ -231,3 +238,12 @@ func (provisioner *RancherProvisioner) getLatestISOURL() (string, error) {
 
 	return "", fmt.Errorf("Failed to find current version")
 }
+
+func selectDocker(p Provisioner, baseURL string) error {
+	// TODO: detect if its a cloud-init, or a ros setting - and use that..
+	if output, err := p.SSHCommand(fmt.Sprintf("wget -O- %s | sh -", baseURL)); err != nil {
+		return fmt.Errorf("error selecting docker: (%s) %s", err, output)
+	}
+
+	return nil
+}