Setting up biber as a default biblatex backend in the configuration file

The `biblatex` release notes recommend to setup `backend=biber` in `biblatex.cfg`, however LaTeX refuses to accept this text in `biblatex.cfg`:

``````\ProvidesFile{biblatex.cfg}
\usepackage[backend=biber]{biblatex}
\endinput
``````

How to set up backend parameter in here properly?

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Load `biblatex` in your main document using `\usepackage[<options>]{biblatex}`. Your configuration file `biblatex.cfg` should look as follows:

``````\ProvidesFile{biblatex.cfg}
\ExecuteBibliographyOptions{backend=biber}
\endinput
``````

UPDATE: As Jonathan has hinted, with `biblatex` v2.0 (released July 2012) `backend` has become a loadtime option, so it is not possible anymore to select the backend engine (biber, BibTeX etc.) via `\ExecuteBibliographyOptions`. Also note that biber (not BibTeX) is now the default backend.

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You beat me by two minutes. :) –  egreg Sep 1 '11 at 11:28
@egreg: I know that feeling. ;-) –  lockstep Sep 1 '11 at 11:28
lockstep, egreg, thanks. That works. –  Anton Sep 1 '11 at 11:34
Unfortunately it doesn't work anymore! At least in v2.2 `backend` is a loadtime option, so this produces an error. –  Jonathan Aug 23 '12 at 9:46
@Jonathan Thanks, answer updated. –  lockstep Aug 23 '12 at 9:53