gistfile1.txt

root@mobile-u64-1164:/etc/apt/sources.list.d# apt-cache policy build-essential
build-essential:
  Installed: (none)
  Candidate: (none)
  Version table:
     11.6ubuntu6 0
        -10 http://mobile-spcwlk-01.nvidia.com/ trusty/main amd64 Packages
        -10 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
     11.6ubuntu4 0
        -10 http://old-releases.ubuntu.com/ubuntu/ raring/main amd64 Packages
root@mobile-u64-1164:/etc/apt/sources.list.d#
root@mobile-u64-1164:/etc/apt/sources.list.d# apt-get install build-essential
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package build-essential is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'build-essential' has no installation candidate