Comment 8 for bug 1719629

Yes, sorry, upon closer inspection, this must be an issue with me using a separate profile directory for each version I compile (https://gitlab.com/snippets/1671741).

It's not compiled into the binary (and probably the ./config/inkscape directory is hardcoded), but modified later by calling Inkscape with the corresponding parameter... Please ignore that part!
It's nonsense to expect Inkscape to create a whole directory tree in just any directory given as PROFILE_DIR.

Just tested on a standard Ubuntu with 0.92.2 from ppa, all directories are created. Sorry again! I forgot...