[Koha] Can't upgrade Koha

[Mark Tompsett]

Greetings,

When I got a similar error, I did a:
$ sudo apt-get install libcrypt-eksblowfish-perl libclass-mix-perl
Okay, I did the libclass-mix-perl seperately when it complained the 
dependency wasn't going to install, but this should suffice to keep going. 
You may also need to grab libcrypt-cbc-perl as well. I happened to already 
be using that for my custom login code.

Hope this helps.

GPML,
Mark Tompsett