Missing module

[Alpár Jüttner]

Hi,

I have a clone of http://selenic.com/repo/hg, which I want to refresh.
However I get the following error message.

> hg pull
pulling from http://selenic.com/repo/hg
searching for changes
adding changesets
transaction abort!
rollback completed
abort: could not import module mpatch!
(did you forget to compile extensions?)

What does it mean? I have mercurial-1.0.1, I installed it from source,
following the instructions in the README file. Is there any hidden trick
here again?

Best regards,
Alpar