SUMMARY `kdesrc-build --initial-setup` creates ~/.kdesrc-buildrc. It would be nice if it created that file under ~/.config. In order to avoid breaking current setups, `kdesrc-build` could try using file under ~/.config and if it doesn't exist, fallback to ~/.kdesrc-buildrc.
For those who come across this bug, a merge request that would fix this is at https://invent.kde.org/kde/kdesrc-build/merge_requests/11