def build_sdist(self, sdist_directory, config_settings=None):
return self._call_hook('<STR_LIT>', {<EOL>'<STR_LIT>': abspath(sdist_directory),<EOL>'<STR_LIT>': config_settings,<EOL>})<EOL>
Build an sdist from this project.

        Returns the name of the newly created file.

        This calls the 'build_sdist' backend hook in a subprocess.