NIXPKG1 http://nixos.org/releases/nixpkgs/nixpkgs-0.12/MANIFEST emacs-22.3 x86_64-linux /nix/store/pa08jq0f5mm8cam180483a2w9y9ms3ds-emacs-22.3.drv /nix/store/0fpnqygkcjhrrf1n367dzqfc6p9d1r51-emacs-22.3