--- a/tools/mercurial/hgsetup/update.py
+++ b/tools/mercurial/hgsetup/update.py
@@ -21,17 +21,17 @@ Your Mercurial recommended extensions ar
 
 class MercurialUpdater(object):
 
     def __init__(self, state_dir):
         self.state_dir = os.path.normpath(state_dir)
         self.ext_dir = os.path.join(self.state_dir, 'mercurial', 'extensions')
         self.vcs_tools_dir = os.path.join(self.state_dir, 'version-control-tools')
 
-    def update_all(self, config_paths):
+    def update_all(self):
         try:
             os.makedirs(self.ext_dir)
         except OSError as e:
             if e.errno != errno.EEXIST:
                 raise
 
         try:
             hg = which.which('hg')

--- a/tools/mercurial/mach_commands.py
+++ b/tools/mercurial/mach_commands.py
@@ -56,15 +56,15 @@ class VersionControlCommands(object):
         state_path = os.path.join(state_dir, 'setup.lastcheck')
 
         with open(state_path, 'a'):
             os.utime(state_path, None)
 
         if update_only:
             from hgsetup.update import MercurialUpdater
             updater = MercurialUpdater(self._context.state_dir)
-            result = updater.update_all(map(os.path.expanduser, config_paths))
+            result = updater.update_all()
         else:
             from hgsetup.wizard import MercurialSetupWizard
             wizard = MercurialSetupWizard(self._context.state_dir)
             result = wizard.run(map(os.path.expanduser, config_paths))
 
         return result