Cmake compilation "error: header 'RConfigure.h'"

Hi @jordanbe,
and welcome to the ROOT forum!

This was bug https://sft.its.cern.ch/jira/browse/ROOT-10776, also reported here and here on the forum.

The fix has been backported to the v6-22-00-patches branch, can you please try building again with the patches branch rather than the v6-22-00 tag (git checkout v6-22-00-patches)?

Cheers,
Enrico