Note: The blender --python -m syntax doesn't work because Blender's --python flag expects a script file, not a module. Always use Blender's Python executable directly.

Otherwise Blender's python won't work properly. To install Phobos in blender download the phobos.zip of the release or zip the phobos subdirectory (e.g. zip -r phobos.zip phobos) Phobos has several ...