diff -r e22695b4472f -r 8e4be44a676f mercurial/windows.py
--- a/mercurial/windows.py	Wed Jan 06 21:11:58 2010 +0100
+++ b/mercurial/windows.py	Wed Jan 06 21:11:58 2010 +0100
@@ -352,6 +352,9 @@
         STARTUPINFO())
     return pid
 
+def gethgcmd():
+    return [sys.executable] + sys.argv[:1]
+
 try:
     # override functions with win32 versions if possible
     from win32 import *