diff --git a/hippunfold/workflow/rules/common.smk b/hippunfold/workflow/rules/common.smk
index 6818b4d8..301552bf 100644
--- a/hippunfold/workflow/rules/common.smk
+++ b/hippunfold/workflow/rules/common.smk
@@ -333,12 +333,15 @@ def get_final_output():
     modality_suffix = get_modality_suffix(config["modality"])
     modality_key = get_modality_key(config["modality"])
 
+    # use a zip list for subject/session:
+    zip_list = config["input_zip_lists"][modality_key]
+    if "session" in zip_list:
+        zip_list = snakebids.filter_list(zip_list, {"session": config["sessions"]})
+
     final_output.extend(
         expand(
-            subj_output,
+            expand(subj_output, zip, allow_missing=True, **zip_list),
             modality_suffix=modality_suffix,
-            subject=config["input_lists"][modality_key]["subject"],
-            session=config["sessions"],
         )
     )