The NixOS-WSL module's wslConf.interop submodule declares only `enabled`
and `appendWindowsPath`. `register` and `includePath` are not valid
wsl.conf interop keys, and the freeform INI type does not cover keys
nested under the already-declared `interop` group, so they were rejected
as unknown options. Remove them.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>