Nested ESXi using custom ESXi ISO error

I was trying to install nested ESXi 5.5 environment and came across this error <VALIDATE_HOST_HW ERROR: vendor VIB for HP found, but host is VMware, Inc.>

After a bit of digging around it appears that I was using a custom ESXi ISO from HP which was the cause of the problem. The ESXi installer was looking for HP hardware information which it couldn't gather. So next time remember when doing a nested build just use the default VMware ISO.