anchor.diff:  , folks
   , libgdata
   , sqlite
  +, glib-networking
   , granite
   , evolution-data-server
  -, appstream
   , wrapGAppsHook
   , libgee
   }:
   
   stdenv.mkDerivation rec {
     pname = "elementary-mail";
  -  version = "6.4.0";
  +  version = "7.0.0";
   
     src = fetchFromGitHub {
       owner = "elementary";
       repo = "mail";
       rev = version;
  -    sha256 = "sha256-ooqVNMgeAqGlFcfachPPfhSiKTEEcNGv5oWdM7VLWOc=";
  +    sha256 = "sha256-DO3nybH7tb/ISrSQ3+Oj612m64Ov6X0GAWePMbKjCc4=";
     };
   
  -  patches = [
  -    # Fix build with vala 0.56
  -    # https://github.com/elementary/mail/pull/765
  -    (fetchpatch {
  -      url = "https://github.com/elementary/mail/commit/c3aa61d226f49147d7685cc00013469ff4df369a.patch";
  -      sha256 = "sha256-OxNBGIC1hrEaFSufQ59Wb0AMfdzqPt6diL4g3hbL/Ig=";
  -    })
  -  ];
  -
     nativeBuildInputs = [
  -    appstream
  -    desktop-file-utils
       libxml2
       meson
       ninja
  
positive.code:   buildInputs = [
      evolution-data-server
      folks
      granite
      gtk3
      libgdata
  
negative.code: { lib
  , stdenv
  , fetchFromGitHub
  , nix-update-script
  , pkg-config
  , meson
  , ninja
  , python3
  , vala
  , gtk3
  , libxml2
  , libhandy
  