NIXPKG1 http://nixos.org/releases/nixpkgs/nixpkgs-0.12/MANIFEST mk-2006-01-31 x86_64-linux /nix/store/mmdllazwk6i5kpif5sahcb44cb62haz1-mk-2006-01-31.drv /nix/store/dk2nwha6crwh63rsk987zvpib1dxnksn-mk-2006-01-31