In particular, rules are:
* For environment variables, paths are relative to the current working directory.
+* For config values loaded directly from the [`--config KEY=VALUE`](#command-line-overrides) option,
+ paths are relative to the current working directory.
* For config files, paths are relative to the parent directory of the directory where the config files were defined,
no matter those files are from either the [hierarchical probing](#hierarchical-structure)
or the [`--config <path>`](#command-line-overrides) option.