anchor.diff: -{ stdenv, pythonPackages, fetchFromGitHub, dialog }:
  +{ stdenv, python2Packages, fetchFromGitHub, dialog }:
   
  -pythonPackages.buildPythonApplication rec {
  +# Latest version of certbot supports python3 and python3 version of pythondialog
  +
  +python2Packages.buildPythonApplication rec {
     name = "certbot-${version}";
     version = "0.6.0";
   
  
positive.code:     zope_component
      zope_interface
    ];
    buildInputs = [ dialog ] ++ (with pythonPackages; [ nose mock gnureadline ]);
  
    patchPhase = ''
      substituteInPlace certbot/notify.py --replace "/usr/sbin/sendmail" "/var/setuid-wrappers/sendmail"
  
negative.code:     sha256 = "1x0prlldkgg0hxmya4m5h3k3c872wr0jylmzpr3m04mk339yiw0c";
    };
  
    propagatedBuildInputs = with python2Packages; [
      ConfigArgParse
      acme
      configobj
  