Customisation of Server 2012R2 in VMware ESX 5 VM fails

In VMware ESX 5.0.U2 when deploying a Server 2012R2 VM from a template with customisations applied the following error message appears:

Customization of the guest operating system ‘windows8Server64Guest’ is not supported in this configuration

The solution (for me at least) is to install VMtools on the template VM and retry the Deploy operation.