anchor.diff:  
     buildInputs = [
       gtk3
  +    libhandy
       glib
       webkitgtk
       sqlite
  
positive.code: 
  stdenv.mkDerivation rec {
    pname = "yelp";
    version = "41.2";
  
    src = fetchurl {
      url = "mirror://gnome/sources/yelp/${lib.versions.major version}/${pname}-${version}.tar.xz";
      sha256 = "sha256-sAvwM/At15ttPyVQMccd+NbtOOVSyHC485GjdHJMQ8U=";
    };
  
    nativeBuildInputs = [
  
negative.code: , webkitgtk
  , pkg-config
  , gtk3
  , libhandy
  , glib
  , gnome
  , sqlite
  