NIXPKG1 http://nixos.org/releases/nixpkgs/nixpkgs-0.12/MANIFEST gnugrep-2.5.3 i686-linux /nix/store/pwbypfx8cksry8vw7pg4lnqcwfg0b72v-gnugrep-2.5.3.drv /nix/store/mjzv772s5y2v89mgv1d4vifrbwvh9x1f-gnugrep-2.5.3