[sympa-fr] erreur make install, 5.1b / debian

["ChaosMedia > WebDev" <adresse@cachée>]

l'installation de sympa 5.1b sur un debian stable genere l'erreur suivante :

Installing mo file.../home/sympa/locale/zh_CN/LC_MESSAGES/sympa.mo
Installing mo file.../home/sympa/locale/zh_TW/LC_MESSAGES/sympa.mo
make[1]: Leaving directory `/home/src/sympa-5.1b/po'
make[1]: Entering directory `/home/src/sympa-5.1b/doc/man8'
Installing man pages.../usr/local/man/man8/archived.8
Overwriting /usr/local/man/man8/archived.8
chgrp: too few arguments
Try `chgrp --help' for more information.
Installing man pages.../usr/local/man/man8/bounced.8
Overwriting /usr/local/man/man8/bounced.8
chgrp: too few arguments
Try `chgrp --help' for more information.
Installing man pages.../usr/local/man/man8/alias_manager.8
Overwriting /usr/local/man/man8/alias_manager.8
chgrp: too few arguments
Try `chgrp --help' for more information.
Installing man pages.../usr/local/man/man8/sympa.8
Overwriting /usr/local/man/man8/sympa.8
chgrp: too few arguments
Try `chgrp --help' for more information.
make[1]: *** [newinstall] Error 1
make[1]: Leaving directory `/home/src/sympa-5.1b/doc/man8'
make: *** [installman] Error 1

a noter que le probleme de detection de locales est toujours present en 
fin de make
mais mes experiences precedentes me permettent d'ignorer cette erreur

Marc