diff --git a/apps/vinyl/src/assets.py b/apps/vinyl/src/assets.py
index 90e543d..059457e 100644
--- a/apps/vinyl/src/assets.py
+++ b/apps/vinyl/src/assets.py
@@ -127,17 +127,18 @@ def cleaned_deals(
     deps=[cleaned_deals],
     io_manager_key="polars_parquet_io_manager",
     automation_condition=dg.AutomationCondition.eager(),
+    output_required=False,
 )
-def works(context: dg.AssetExecutionContext) -> pl.DataFrame | None:
+def works(context: dg.AssetExecutionContext) -> Iterator[dg.Output[pl.DataFrame]]:
     """Aggregate works from cleaned deals."""
     partitions = context.instance.get_materialized_partitions(cleaned_deals.key)
     ic(partitions)
     logger.info("Works", partitions=partitions)
     dfs = list(load_partitions(context, cleaned_deals.key, partitions))
+    ic(len(dfs))
     if dfs:
         columns = ["artist", "title", "release"]
-        return pl.concat(dfs, how="vertical_relaxed").select(columns).unique()
-    return None
+        yield dg.Output(pl.concat(dfs, how="vertical_relaxed").select(columns).unique())
 
 
 @asset(
diff --git a/shared/src/shared/utils.py b/shared/src/shared/utils.py
index 9f94f00..8379799 100644
--- a/shared/src/shared/utils.py
+++ b/shared/src/shared/utils.py
@@ -1,8 +1,6 @@
 from collections.abc import Iterator
 from typing import Mapping
 
-import polars as pl
-
 import dagster as dg
 
 
@@ -87,7 +85,7 @@ def parse_partition_keys(
 
 def load_partitions(
     context: dg.AssetExecutionContext, asset_key: dg.AssetKey, partitions: set[str]
-) -> Iterator[pl.DataFrame]:
+) -> Iterator[object]:
     """
     Load data from an asset for the specified partitions.
 
@@ -99,8 +97,12 @@ def load_partitions(
     Yields:
         DataFrames for each partition specified.
     """
-    from definitions import definitions
 
-    loader = definitions.get_asset_value_loader(instance=context.instance)
+    loader = context.repository_def.get_asset_value_loader(instance=context.instance)
     for partition_key in partitions:
-        yield loader.load_asset_value(asset_key=asset_key, partition_key=partition_key)
+        if (
+            value := loader.load_asset_value(
+                asset_key=asset_key, partition_key=partition_key
+            )
+        ) is not None:
+            yield value