anchor.diff:    buildInputs = [
       dbus
       fontconfig
  +    freetype
       harfbuzz_lib
       libpng
       libx11
  
positive.code: { stdenv
  , fetchFromGitHub
  , lib
  , ncurses
  , python3
  
  , dbus
  , fontconfig
  , harfbuzz_lib
  , libpng
  , libx11
  
negative.code: stdenv.mkDerivation rec {
    name = "kitty-${version}";
  
    src = fetchurl {
      url = "https://github.com/kovidgoyal/kitty/releases/download/v${version}/"
        + "${name}.tar.xz";
      sha256 = "f25224c0a5b0c6f32662d31452fd6fed1665e37f2a1acd193e1a8a838e86185f";
    };
  
  