diff --git a/pushall b/pushall
index 2b4a8a5ca6..f1ad8e2ec3 100755
--- a/pushall
+++ b/pushall
@@ -1,9 +1,10 @@
 #!/bin/sh
 
 #sites='ko repo github2 sfjp sf.net'
-sites='ko repo github2'
-nexts='ko repo github2 '
-mirrors='github gob-private'
+
+: ${sites:="ko repo github2"}
+: ${nexts:="$sites"}
+: ${mirrors="github gob-private"}
 
 push_retry () {
 	sites=$1