* `mkosi.conf.d/` is parsed in the same directory as `mkosi.conf` if it
exists. Each directory and each file with the `.conf` extension in
`mkosi.conf.d/` is parsed. Any directory in `mkosi.conf.d` is parsed
- as if it were a regular top level directory.
+ as if it were a regular top level directory, except for `mkosi.images/`
+ and `mkosi.tools.conf`, which are only picked up in the top level
+ directory.
* If any profiles are configured, their configuration is parsed from the
`mkosi.profiles/` directory.
* Subimages are parsed from the `mkosi.images/` directory if it exists.