diff -r 1e497df514e2 -r 931a72e00efa mercurial/localrepo.py
--- a/mercurial/localrepo.py	Thu Feb 10 09:03:06 2011 +0100
+++ b/mercurial/localrepo.py	Fri Feb 18 20:25:25 2011 +0100
@@ -75,7 +75,8 @@
                 if inst.errno != errno.ENOENT:
                     raise
             for r in requirements - self.supported:
-                raise error.RepoError(_("requirement '%s' not supported") % r)
+                raise error.RequirementError(
+                          _("requirement '%s' not supported") % r)
 
         self.sharedpath = self.path
         try: