diff --git a/message_ix_buildings/chilled/postprocess/postprocess.py b/message_ix_buildings/chilled/postprocess/postprocess.py
index bef248b..5ceabdf 100644
--- a/message_ix_buildings/chilled/postprocess/postprocess.py
+++ b/message_ix_buildings/chilled/postprocess/postprocess.py
@@ -255,4 +255,4 @@ def postprocess_electricity_demand(input_path, input_version_name):
     )
 
 
-postprocess_electricity_demand(dle_path, cfg.vstr)
+postprocess_electricity_demand(dle_path, cfg.vstr2 + "_" + cfg.vstr)
diff --git a/message_ix_buildings/chilled/util/config.py b/message_ix_buildings/chilled/util/config.py
index bafe7ff..cac5d17 100644
--- a/message_ix_buildings/chilled/util/config.py
+++ b/message_ix_buildings/chilled/util/config.py
@@ -18,6 +18,7 @@ class Config:
     #:
     #: This is used to name the output files and directories.
     vstr: str = "ALPS2023"
+    vstr2 = "v19"
 
     #: Select the climate model.
     #: