NIXPKG1 http://nix.cs.uu.nl/dist/nix/nixpkgs-0.9/MANIFEST bison-1.875d i686-linux /nix/store/3g8qw8ng0d1bg5dyxc219z03adiq0y7i-bison-1.875d.drv /nix/store/h1mg3pvk6ijzy3n5rb1s7zy53vy437k2-bison-1.875d