ISO contained updates are ignored

[devployment]

I patched my installation ISO with all current updates with NTLite. To check this I installed the Server 2012 R2 manually with this ISO. Then it finds only 5 additional updates after installation.

If I use the packer template with the same ISO, choco installs 159 updates. That's exactly the amount of updates it would install if the ISO would not be patched at all.

Am I missing here something or why are updates already applied to the ISO not respected during the packer process?

[mwrock]

The packer script simply calls the WSUS api for updates. I'd imagine that if the updates were corretly installed, it would recognize them. Do you see the updates if you manually install the iso?