anchor.diff:  { lib, stdenv
   , fetchurl
  -, fetchpatch
   , at-spi2-core
   , babl
   , dbus
  
positive.code: , gtk3
  , itstool
  , libdazzle
  , libgdata
  , libxml2
  , meson
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "gnome-photos";
    version = "40.0";
  
    outputs = [ "out" "installedTests" ];
  
    src = fetchurl {
      url = "mirror://gnome/sources/${pname}/${lib.versions.major version}/${pname}-${version}.tar.xz";
      sha256 = "1bzi79plw6ji6qlckhxnwfnswy6jpnhzmmyanml2i2xg73hp6bg0";
    };
  
    patches = [
      ./installed-tests-path.patch
    ];
  
    nativeBuildInputs = [
  