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:       "ftp://ftp.funet.fi/pub/unix/shells/tcsh/${pname}-${version}.tar.gz"
        "ftp://ftp.funet.fi/pub/unix/shells/tcsh/old/${pname}-${version}.tar.gz"
      ];
      sha256 = "sha256-viz9ZT0qDH9QbS3RTBIyS6dJvUhAN75t9Eo5c/UiYrc=";
    };
  
    buildInputs = [ ncurses ];
  
negative.code:     });
  
    meta = with lib; {
      homepage = "https://www.tcsh.org/";
      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
  