How to find Cadence install location in 17.2?

SPB 17.2 has removed the CDSROOT env var, which I'd used to determine the installation folder. I used it in a post-install script which configured users' PCs.

Is there a way to determine the install location in 17.2? For now if the env var was blank I just input a text string, but that's ugly and a pain to maintain.

Thanks!