trying yet again to make work for both streaming settings

merfish.py

@@ -27,7 +27,7 @@ class MERFISH(datasets.GeneratorBasedBuilder):
 
     def _split_generators(self, dl_manager):
         expression_prefix = f"{self.config.name}/expression"
-        repo_id = self.config.data_dir or self._relative_data_dir()
+        repo_id = "data4science/merfish"
 
         if dl_manager.is_streaming:
             expression_files = list(dl_manager.iter_files(expression_prefix))