Update to ESXi 6.7 U3 using esxcli fails with error „Failed to setup upgrade using esx-update VIB“

After the gerneral availability of ESXi 6.7 U3, I decided it is time to update my homelab. I used the integrated vSphere Update Manager (VUM) for my nested vSAN Cluster without any issues. During my VCAP-DVC Deploy preparation earlier this year I used an old Intel NUC system to deploy an additional vCenter Server Appliance (VCSA) in order to play around with Enhanced Linked Mode (ELM). I wanted to have the VCSAs in different Layer 3 networks, so I copied the design from the nested cluster and installed a nested router alongside with a nested ESXi host. The nested ESXi is used to host the second VCSA. Due to this design I can not use the integrated VUM of the second VCSA to update this standalone ESXi host.

The virtual machines (VMs) on the standalone ESXi host are not very important, so I decided to shut them down together with the VCSA and update the nested ESXi host via CLI. For details on how to update ESXi 6.x using the CLI, take a look at one of my previous blog posts here. I used this method quite some time so I was certain to have no issues with the update. But this time it was different, the update failed.

esxcli software profile update failes
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