NIXPKG1 http://nixos.org/releases/nixpkgs/nixpkgs-0.12/MANIFEST cksfv-1.3 x86_64-linux /nix/store/zi94l4biipfpw61lzd3b2bz3ihy2k237-cksfv-1.3.drv /nix/store/2chvwmwyrsblvx583jg1z9y4f1hpqqlv-cksfv-1.3