nixpkgs/pkgs/misc/bleeding-edge-fetch-info/takusen.nix

 args: with args; fetchurl { 
  url = http://mawercer.de/~nix/repos/takusen.tar.gz;
  sha256 = "35f3dbededae1a8d3bf648b229cbaf983907ff762b80674a65505f13c44147df";}