Sort directory listings

run-exp.py

@@ -43,7 +43,7 @@ class Variable:
             directory = pathlib.Path(value_config["directory"]).expanduser()
             assert directory.exists() and directory.is_dir()
 
-            values = list(directory.iterdir())
+            values = sorted(list(directory.iterdir()))
 
             if value_config.get("basename", False):
                 values = [v.name for v in values]