diff --git a/docetl/builder.py b/docetl/builder.py
index 23eb99a3..380faa11 100644
--- a/docetl/builder.py
+++ b/docetl/builder.py
@@ -969,7 +969,6 @@ def _get_sample_data(
             dataset = Dataset(
                 type=dataset_config["type"],
                 path_or_data=dataset_config["path"],
-                source=dataset_config["source"],
                 parsing=dataset_config.get("parsing", []),
                 user_defined_parsing_tool_map=self.parsing_tool_map,
             )