Thanks Martín - my PC is connected to the internet, in fact I was able to update packages for two other systems of the same customer, but this system did not have the environment set up and that is where this is failing.
Thanks Satid - yes, I had seen those docs and as Martín also suggested, I saw the option to perform an offline installation and clone another system's repo, but I thought I'd try to troubleshoot this first and find out what is failing exactly.