--- a/hgext/configwizard/__init__.py
+++ b/hgext/configwizard/__init__.py
@@ -267,17 +267,17 @@ cmdtable = {}
 
 # We want the extension to load on ancient versions of Mercurial.
 # cmdutil.command was introduced in 1.9.
 try:
     command = cmdutil.command(cmdtable)
 except AttributeError:
     command = None
 
-wizardsteps = {
+wizardsteps = set([
     'hgversion',
     'username',
     'diff',
     'color',
     'pager',
     'curses',
     'historyediting',
     'fsmonitor',
@@ -285,17 +285,17 @@ wizardsteps = {
     'wip',
     'security',
     'firefoxtree',
     'codereview',
     'pushtotry',
     'multiplevct',
     'configchange',
     'permissions',
-}
+])
 
 
 def configwizard(ui, repo, statedir=None, **opts):
     """Ensure your Mercurial configuration is up to date."""
     runsteps = set(wizardsteps)
     if ui.hasconfig('configwizard', 'steps'):
         runsteps = set(ui.configlist('configwizard', 'steps'))
 
@@ -520,22 +520,22 @@ def _promptvctextension(ui, cw, ext, msg
     if uipromptchoice(ui, '%s (Yn) $$ &Yes $$ &No' % msg):
         return
 
     _enableext(cw, ext, ext_path)
 
 
 def _checkpager(ui, cw):
     haveext = ui.hasconfig('extensions', 'pager')
-    attends = {
+    attends = set([
         'help',
         'incoming',
         'outgoing',
         'status',
-    }
+    ])
 
     haveattends = all(ui.hasconfig('pager', 'attend-%s' % a) for a in attends)
     haveconfig = ui.hasconfig('pager', 'pager')
 
     if haveext and haveattends and haveconfig:
         return
 
     answer = uipromptchoice(ui, PAGER_INFO, default=0) + 1