pip install Killed

I am trying to install Django using pip directly on the Yun (openWrt on SD).
It seems to start its work, but then after a while it stops with the message "Killed":

root@Arduino:/mnt/sda1/arduino/tmp# pip install Django-1.7.1.tar.gz 


Processing ./Django-1.7.1.tar.gz


Killed

Any suggestions?

Edit: I could succesfully install Django manually, but not using pip?

opkg update
opkg install python-django

Wow, that I didn't try the obvious...

A google search on django and arduino yun suggests more complicated adventures :-\

Thanks for pointing this out!