NIXPKG1 http://nixos.org/releases/nixpkgs/nixpkgs-0.12/MANIFEST thunderbird-2.0.0.21 i686-linux /nix/store/sny7hiq0hls3k6dxgpg5407wajx65hvw-thunderbird-2.0.0.21.drv /nix/store/zznd2n26mx7z06lanx0jbz2w0iir5vyg-thunderbird-2.0.0.21