anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "dialog";
  -  version = "1.3-20190211";
  +  version = "1.3-20201126";
   
     src = fetchurl {
       urls = [
         "ftp://ftp.invisible-island.net/dialog/${pname}-${version}.tgz"
         "https://invisible-mirror.net/archives/dialog/${pname}-${version}.tgz"
       ];
  -    sha256 = "1lx0bvradzx1zl7znlrsnyljcs596r7wamkhyq37ikbxsy4y5h29";
  +    sha256 = "sha256-ySM6bI6jOlniN45RRq4r0TtRl0TP22R690IK2sWtOGY=";
     };
   
     buildInputs = [ ncurses ];
  
positive.code: { stdenv, fetchurl, ncurses
  , withLibrary ? false, libtool
  , unicodeSupport ? true
  , enableShared ? !stdenv.isDarwin
  
negative.code: 
    installTargets = [ "install${stdenv.lib.optionalString withLibrary "-full"}" ];
  
    meta = with stdenv.lib; {
      homepage = "https://invisible-island.net/dialog/dialog.html";
      description = "Display dialog boxes from shell";
      license = licenses.lgpl21Plus;
      maintainers = with maintainers; [ AndersonTorres spacefrogg ];
      platforms = ncurses.meta.platforms;
    };
  }
  