That’s due to the lack of such library in debian wheezy.
Here’s the walkaround:
i don’t think you should use sid, though, probably just using a jessie repository would do the job.
Since i do not have a clear idea of how elivecd repos are organized, just do something like this:
mv /etc/apt/sources.list.d/* ~/Documents /elive_repos/
add these lines to the file:
deb http://ftp.it.debian.org/debian/ jessie main contrib non-free
deb-src http://ftp.it.debian.org/debian/ jessie main contrib non-free
Moveout of X11, so open a terminal (ctrl+alt+f1) and kill lightdm (or whatever your desktop manager is)
then update apt and install the needed library updates:
apt-get install libc6 libc6-dev libc6-dbg
in case you corss graded elive you can use lib6-amd64, but if you cross graded it i don’t think you need me to tell you eheheh
At this point reboot your computer, delete /etc/apt/sources.list and bring everything to the status quo:
mv ~/Documents/elive_repos/* /etc/apt/sources.list.d/
I DID NOT TRY THIS, and i do not know if @Thanatermesis modded libc6 too, so this may brick your system (which, luckily, is not such a big deal with elive! i broke it in any way possible, however i always just reinstalled it in upgrade mode and i never lost any app nor personal file )