non sudo toolkit install and pkgconfig location bug?

I’m trying to do a non sudo install of the toolkit (no driver) so that I can have multiple versions without commingling the releases. Using --toolkitpath I can redirect some things. Cuda 9.2 used to put the pkgconfig directory below . Cuda 10.1 (& update 1) seem to now want to put the .pc files in /usr/lib64/pkgconfig. I tried using --defaultroot (and --librarypath), but it seems to ignore it and still try to put them in /usr/lib64/pkgconfig.

It seems to me I should be able to redirect the .pc files along with the other system libraries, but I can’t find a way to make it happen. Thoughts?

Environment: CentOS 7.6