anchor.diff:        - history mechanism
         - job control
       '';
  -    homepage = "https://www.tcsh.org/";
       license = licenses.bsd2;
       maintainers = with maintainers; [ AndersonTorres ];
  -    platforms = platforms.linux ++ platforms.darwin;
  +    platforms = platforms.unix;
     };
   
     passthru = {
  
positive.code:     });
  
    meta = with lib; {
      description = "An enhanced version of the Berkeley UNIX C shell (csh)";
      longDescription = ''
        tcsh is an enhanced but completely compatible version of the
        Berkeley UNIX C shell, csh. It is a command language interpreter
        usable both as an interactive login shell and a shell script
        command processor.
        It includes:
        - command-line editor
        - programmable word completion
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "tcsh";
    version = "6.22.04";
  
    src = fetchurl {
      urls = [
  