Installation fails because of mutt_dotlock

[Vincent Lefevre <vincent@xxxxxxxxxx>]

I still have the same problem:

$ make install
[...]
chgrp: changing group of `/home/vlefevre/i686-linux/bin/mutt_dotlock': 
Operation not permitted
Can't fix mutt_dotlock's permissions!
make[3]: *** [install-exec-local] Error 1
make[3]: Leaving directory `/home/vlefevre/software/mutt/mutt'
make[2]: *** [install-am] Error 2
make[2]: Leaving directory `/home/vlefevre/software/mutt/mutt'
make[1]: *** [install-recursive] Error 1
make[1]: Leaving directory `/home/vlefevre/software/mutt/mutt'
make: *** [install] Error 2

though there's already a system mutt_dotlock: /usr/bin/mutt_dotlock
How can I ask Mutt to use it instead of installing a new one?

-- 
Vincent Lefèvre <vincent@xxxxxxxxxx> - Web: <http://www.vinc17.org/>
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Work: CR INRIA - computer arithmetic / SPACES project at LORIA