lunavorax@lunavorax-macbook:~$ sudo ./reflash_ben.sh 
working dir:      /home/lunavorax/.qi/nanonote/ben/latest
chosen method:    http
chosen version:   latest
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fetching bootloader...
fetching kernel...
fetching rootfs...
booting device...
./reflash_ben.sh: line 154: usbboot : commande introuvable
===
fatal error occured - ABORTED
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can't boot device - xburst-tools setup correctly? device in boot-mode? device connected?
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Before reporting this as a bug
please ensure you're using the latest available version of
  this reflash script
  the xburst-tools