diff --git a/post-processor/vsphere-template/post-processor.go b/post-processor/vsphere-template/post-processor.go
index 86c9f54b4..8b0918b05 100644
--- a/post-processor/vsphere-template/post-processor.go
+++ b/post-processor/vsphere-template/post-processor.go
@@ -88,13 +88,6 @@ func (p *PostProcessor) PostProcess(ui packer.Ui, artifact packer.Artifact) (pac
 		return nil, false, fmt.Errorf("Unknown artifact type, can't build box: %s", artifact.BuilderId())
 	}
 
-	source := ""
-	for _, path := range artifact.Files() {
-		if strings.HasSuffix(path, ".vmx") {
-			source = path
-			break
-		}
-	}
 	// In some occasions the VM state is powered on and if we immediately try to mark as template
 	// (after the ESXi creates it) it will fail. If vSphere is given a few seconds this behavior doesn't reappear.
 	ui.Message("Waiting 10s for VMware vSphere to start")
@@ -119,12 +112,10 @@ func (p *PostProcessor) PostProcess(ui packer.Ui, artifact packer.Artifact) (pac
 		},
 		&stepMarkAsTemplate{
 			VMName: artifact.Id(),
-			Source: source,
 		},
 	}
 	runner := common.NewRunnerWithPauseFn(steps, p.config.PackerConfig, ui, state)
 	runner.Run(state)
-
 	if rawErr, ok := state.GetOk("error"); ok {
 		return nil, false, rawErr.(error)
 	}
diff --git a/post-processor/vsphere-template/step_mark_as_template.go b/post-processor/vsphere-template/step_mark_as_template.go
index 0e5465054..f5d362e6f 100644
--- a/post-processor/vsphere-template/step_mark_as_template.go
+++ b/post-processor/vsphere-template/step_mark_as_template.go
@@ -4,17 +4,18 @@ import (
 	"context"
 	"fmt"
 	"path"
+	"regexp"
 	"strings"
 
 	"github.com/hashicorp/packer/packer"
 	"github.com/mitchellh/multistep"
 	"github.com/vmware/govmomi"
 	"github.com/vmware/govmomi/object"
+	"github.com/vmware/govmomi/vim25/types"
 )
 
 type stepMarkAsTemplate struct {
 	VMName string
-	Source string
 }
 
 func (s *stepMarkAsTemplate) Run(state multistep.StateBag) multistep.StepAction {
@@ -32,34 +33,33 @@ func (s *stepMarkAsTemplate) Run(state multistep.StateBag) multistep.StepAction
 		return multistep.ActionHalt
 	}
 
-	host, err := vm.HostSystem(context.Background())
-	if err != nil {
+	if err := unregisterPreviousVM(cli, folder, s.VMName); err != nil {
 		state.Put("error", err)
 		ui.Error(err.Error())
 		return multistep.ActionHalt
 	}
 
-	if err := vm.Unregister(context.Background()); err != nil {
+	path, err := datastorePath(vm, s.VMName)
+	if err != nil {
 		state.Put("error", err)
 		ui.Error(err.Error())
 		return multistep.ActionHalt
 	}
 
-	source := strings.Split(s.Source, "/vmfs/volumes/")[1]
-	i := strings.Index(source, "/")
-
-	path := (&object.DatastorePath{
-		Datastore: source[:i],
-		Path:      source[i:],
-	}).String()
+	host, err := vm.HostSystem(context.Background())
+	if err != nil {
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
 
-	if err := unregisterPreviousVM(cli, folder, s.VMName); err != nil {
+	if err := vm.Unregister(context.Background()); err != nil {
 		state.Put("error", err)
 		ui.Error(err.Error())
 		return multistep.ActionHalt
 	}
 
-	task, err := folder.RegisterVM(context.Background(), path, s.VMName, true, nil, host)
+	task, err := folder.RegisterVM(context.Background(), path.String(), s.VMName, true, nil, host)
 	if err != nil {
 		state.Put("error", err)
 		ui.Error(err.Error())
@@ -75,6 +75,34 @@ func (s *stepMarkAsTemplate) Run(state multistep.StateBag) multistep.StepAction
 	return multistep.ActionContinue
 }
 
+func datastorePath(vm *object.VirtualMachine, name string) (*object.DatastorePath, error) {
+	devices, err := vm.Device(context.Background())
+	if err != nil {
+		return nil, err
+	}
+
+	disk := ""
+	for _, device := range devices {
+		if d, ok := device.(*types.VirtualDisk); ok {
+			if b, ok := d.Backing.(types.BaseVirtualDeviceFileBackingInfo); ok {
+				disk = b.GetVirtualDeviceFileBackingInfo().FileName
+			}
+			break
+		}
+	}
+
+	if disk == "" {
+		return nil, fmt.Errorf("disk not found in '%v'", name)
+	}
+
+	re := regexp.MustCompile("\\[(.*?)\\]")
+
+	datastore := re.FindStringSubmatch(disk)[1]
+	vmx := path.Join("/", path.Dir(strings.Split(disk, " ")[1]), name+".vmx")
+
+	return &object.DatastorePath{datastore, vmx}, nil
+}
+
 // We will use the virtual machine created by vmware-iso builder
 func findRuntimeVM(cli *govmomi.Client, dcPath, name string) (*object.VirtualMachine, error) {
 	si := object.NewSearchIndex(cli.Client)