diff --git a/management/commands/generate_clips.py b/management/commands/generate_clips.py
index ec02002..cd51f07 100644
--- a/management/commands/generate_clips.py
+++ b/management/commands/generate_clips.py
@@ -1,4 +1,5 @@
 import json
+import os
 
 from django.core.management.base import BaseCommand
 from django.conf import settings
@@ -11,7 +12,7 @@ class Command(BaseCommand):
     help = 'generate symlinks to clips and clips.json'
 
     def add_arguments(self, parser):
-        parser.add_argument('--prefix', action='store_', dest='prefix', default="/srv/t_for_time", help='prefix to build clips in')
+        parser.add_argument('--prefix', action='store', dest='prefix', default="/srv/t_for_time", help='prefix to build clips in')
 
     def handle(self, **options):
         prefix = options['prefix']