--- a/mercurial/archival.py	Thu Jun 26 13:58:24 2008 -0500
+++ b/mercurial/archival.py	Thu Jun 26 14:35:46 2008 -0500
@@ -208,7 +208,7 @@
             data = repo.wwritedata(name, data)
         archiver.addfile(name, mode, islink, data)
 
-    ctx = repo.changectx(node)
+    ctx = repo[node]
     if kind not in archivers:
         raise util.Abort(_("unknown archive type '%s'" % kind))
     archiver = archivers[kind](dest, prefix, mtime or ctx.date()[0])