NIXPKG1 http://nix.cs.uu.nl/dist/nix/nixpkgs-0.9/MANIFEST graphviz-2.4 i686-linux /nix/store/9fgvmdkbdbckdc9bl6k9yd9nqi36169b-graphviz-2.4.drv /nix/store/pbys0jv98d89mzsj4qvs62fgp9q0vsr2-graphviz-2.4