Get error when creating an image from blob

[russellseymour]

Using the template in 101-create-image-from-blob-and-vm-from-image as a guide I setup the following:

    {
        "type": "Microsoft.Compute/images",
        "apiVersion": "2016-04-30-preview",
        "name": "ComplianceServer-VM-Image",
        "location": "[variables('location')]",
        "properties": 
        {
            "storageProfile": 
            {
              "osDisk": {
                "osType": "linux",
                "osState": "Generalized",
                "blobUri": "https://x6lx28yt88h0mgqn.blob.core.windows.net/system/Microsoft.Compute/Images/images/compliance-osDisk.0cd1c41f-aea1-43aa-9836-d74130bb8e68.vhd",
                "caching": "ReadWrite",
                "storageAccountType": "Standard_LRS"
              }
            }
        }
    }

However when this is deployed to Azure I immediately get the following error:

{
  "error": {
    "code": "InvalidParameter",
    "target": "disk.blobUri",
    "message": "The blob name in URL https://x6lx28yt88h0mgqn.blob.core.windows.net/system/Microsoft.Compute/Images/images/compliance-osDisk.0cd1c41f-aea1-43aa-9836-d74130bb8e68.vhd contains a slash. This is presently not supported for disks."
  }
}

The URI is the URL to a custom image that has been generalised and was built by Packer.

I do not understand the error that is being given. The SA that is referenced is in the same resource group and location as the Image I am trying to create.

What am I missing? Thanks.