Otra vez mas quedo sin recordar como solucionar el seguiente problema:

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = "es_AR",
        LANG = "es_AR.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C")

La solución en GNU/Debian

/etc/locale.gen descomentar la linea "es_AR ISO-8859-1" y luego ejecutar:

dpkg-reconfigure locales -p critical

Generating locales (this might take a while)...
  es_AR.ISO-8859-1... done
  es_AR.UTF-8... done
Generation complete.