Message :
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
      LANGUAGE = "en_FR:en_US:en_GB:en",
      LC_ALL = "fr_FR",
      LANG = "fr_FR@euro"
   are supported and installed on your system.
   perl: warning: Falling back to the standard locale ("C").
Il faut recompiler les locales :

apt-get install locales
dpkg-reconfigure locales