use parameter scandir instead sys.argv[1]

conda/clean-betas.py

@@ -11,7 +11,7 @@ def main(scandir, dry_run):
 
   betas = dict()
 
-  for (path, dirnames, filenames) in os.walk(sys.argv[1], followlinks=False):
+  for (path, dirnames, filenames) in os.walk(scandir, followlinks=False):
 
     for f in filenames:
       if f.startswith('.'): continue