--- a/hgext/configwizard/__init__.py
+++ b/hgext/configwizard/__init__.py
@@ -10,17 +10,16 @@ import stat
 import subprocess
 import sys
 import uuid
 
 from mercurial import (
     cmdutil,
     demandimport,
     error,
-    scmutil,
     ui as uimod,
     util,
 )
 from mercurial.i18n import _
 
 OUR_DIR = os.path.dirname(__file__)
 execfile(os.path.join(OUR_DIR, '..', 'bootstrap.py'))
 
@@ -333,18 +332,25 @@ def configwizard(ui, repo, statedir=None
         ui.warn(VERSION_TOO_OLD % (
             hgversion[0], hgversion[1],
             MINIMUM_SUPPORTED_VERSION[0], MINIMUM_SUPPORTED_VERSION[1],
         ))
         raise error.Abort('upgrade Mercurial then run again')
 
     uiprompt(ui, INITIAL_MESSAGE, default='<RETURN>')
 
-    configpaths = [p for p in scmutil.userrcpath() if os.path.exists(p)]
-    path = configpaths[0] if configpaths else scmutil.userrcpath()[0]
+    with demandimport.deactivated():
+        # Mercurial 4.2 moved function from scmutil to rcutil.
+        try:
+            from mercurial.rcutil import userrcpath
+        except ImportError:
+            from mercurial.scmutil import userrcpath
+
+    configpaths = [p for p in userrcpath() if os.path.exists(p)]
+    path = configpaths[0] if configpaths else userrcpath()[0]
     cw = configobjwrapper(path)
 
     if 'hgversion' in runsteps:
         if _checkhgversion(ui, hgversion):
             return 1
 
     if 'username' in runsteps:
         _checkusername(ui, cw)