anchor.diff:      gappsWrapperArgs+=(--prefix PATH : "$out/bin")
     '';
   
  -  enableParallelBuilding = true;
  -
     meta = with stdenv.lib; {
       homepage = https://wiki.gnome.org/Apps/Geary;
       description = "Mail client for GNOME 3";
  
positive.code: { stdenv, fetchurl, intltool, pkgconfig, gtk3, vala_0_38, enchant
  , wrapGAppsHook, gdk_pixbuf, cmake, desktop-file-utils
  , libnotify, libcanberra-gtk3, libsecret, gmime
  , libpthreadstubs, sqlite
  , gnome3, librsvg, gnome-doc-utils, webkitgtk }:
  
  let
  
negative.code: 
    propagatedUserEnvPkgs = [ gnome3.gnome-themes-standard ];
  
    nativeBuildInputs = [ vala_0_40 intltool pkgconfig wrapGAppsHook cmake ninja desktop-file-utils gnome-doc-utils gobjectIntrospection ];
    buildInputs = [
      gtk3 enchant webkitgtk libnotify libcanberra-gtk3 gnome3.libgee libsecret gmime sqlite
      libpthreadstubs gnome3.gsettings-desktop-schemas gnome3.gcr isocodes
      gdk_pixbuf librsvg gnome3.defaultIconTheme
    ];
  
    cmakeFlags = [
      "-DISOCODES_DIRECTORY=${isocodes}/share/xml/iso-codes"
    ];
  
    preConfigure = ''
      substituteInPlace src/CMakeLists.txt --replace '`''${PKG_CONFIG_EXECUTABLE} --variable=girdir gobject-introspection-1.0`' '${webkitgtk.dev}/share/gir-1.0'
  