Missing package gcc-4.8-base-mips-cross on emdebian.org

Hi,
I’m using debian wheezy and I’ve added emdebian.org <http://emdebian.org/> on the list of repositories.
I’m trying to install the mips cross compiler but I’m receiving an error that says that the package gcc-4.8-base-mips-cross is impossible to find.
Note that I receive a similar error when I try to install other cross compilers, for example if I try to install the alpha cross compiler an error says that package gcc-4.8-base-alpha-cross is impossible to find.
How to fix it?
Matteo Di Sabatino, Framework Developer at Apio.