alan@gort:~/Development/Snappy/calibre$ calibre 
WARNING: Failed to set default libc locale, using en_US.UTF-8
Traceback (most recent call last):
  File "site.py", line 61, in main
  File "site.py", line 13, in set_default_encoding
  File "locale.py", line 579, in setlocale
Error: unsupported locale setting