Since Z:/silvia/git/OpenUSD/install is the install dir I give build_usd.py, it seems it’s doing the right thing. I tried with both option --onetbb and without, so in that folder I now have an install of tbb and one of one-tbb. Could they be conflicting somehow?
Ah yeah, that sounds plausible. I think the oneTBB and TBB installations have overlapping files, so running the script with and without --onetbb into the same install directory would probably not work well. If blowing everything away and rebuilding from scratch doesn’t work, then we can dig further into whatever error you get from that.