[Discuss-gnuradio] gnuradio installation

[Sohaib Khan]

im following sumits video on utube installation of gnuradio from source..., but 
i have encoutered an error in the last part i-e 7th.
i get this
gnuradio grc_gnuradio pmt volk_modtool
instead of
gnuradio grc_gnuradio gruel

when i move further ignoring this i get stuck at the very last step of the 
procedure
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package gnuradio-companion

how to solve this problem

Sohaib Bin Altaf