anchor.diff:    nativeBuildInputs = lib.optional withManpage sphinx;
   
     propagatedBuildInputs = [
  -    notmuch
  +    notmuch2
       urwid
       urwidtrees
       twisted
  
positive.code: { lib, buildPythonPackage, python, fetchFromGitHub, isPy3k
  , notmuch, urwid, urwidtrees, twisted, python_magic, configobj, mock, file, gpgme
  , service-identity, gnupg, sphinx, gawk, procps, future , withManpage ? false
  }:
  
  buildPythonPackage rec {
    pname = "alot";
    version = "0.9.1";
    outputs = [ "out" ] ++ lib.optional withManpage "man";
  
    disabled = !isPy3k;
  
negative.code:     owner = "pazz";
      repo = "alot";
      rev = version;
      sha256 = "sha256-1reAq8X9VwaaZDY5UfvcFzHDKd71J88CqJgH3+ANjis=";
    };
  
    postPatch = ''
  