anchor.diff:      graphicsmagick
       pkg-config
       pngquant
  -    python
  +    python3
  +    python3.pkgs.nototools
       which
       zopfli
     ];
   
     patches = [
  -    # Port to python3
  -    (fetchpatch {
  -      url = "https://src.fedoraproject.org/rpms/twitter-twemoji-fonts/raw/3bc176c10ced2824fe03da5ff561e22a36bf8ccd/f/noto-emoji-port-to-python3.patch";
  -      sha256 = "1b91abd050phxlxq7322i74nkx16fkhpw14yh97r2j4c7fqarr2q";
  -    })
  -    (fetchpatch {
  -      url = "https://src.fedoraproject.org/rpms/twitter-twemoji-fonts/raw/3bc176c10ced2824fe03da5ff561e22a36bf8ccd/f/noto-emoji-python3.patch";
  -      sha256 = "0mw2c748izb6h9a19jwc0qxlb6l1kj6k8gc345lpf7lfcxfl7l59";
  -    })
  +    # ImageMagick -> GrahphicsMagick
       (fetchpatch {
         url = "https://src.fedoraproject.org/rpms/twitter-twemoji-fonts/raw/3bc176c10ced2824fe03da5ff561e22a36bf8ccd/f/noto-emoji-use-gm.patch";
         sha256 = "0yfmfzaaiq5163c06172g4r734aysiqyv1s28siv642vqzsqh4i2";
  
positive.code:     sha256 = "0vzmlp83vnk4njcfkn03jcc1vkg2rf12zf5kj3p3a373xr4ds1zn";
    };
  
    python = python3.withPackages (pp: with pp; [
      nototools
    ]);
  in
  stdenv.mkDerivation rec {
    pname = "twitter-color-emoji";
    inherit version;
  
    srcs = [
      notoSrc
      twemojiSrc
    ];
  
    sourceRoot = notoSrc.name;
  
    postUnpack = ''
      chmod -R +w ${twemojiSrc.name}
      mv ${twemojiSrc.name} ${notoSrc.name}
    '';
  
    nativeBuildInputs = [
  
negative.code: , python3
  , which
  , zopfli
  , noto-fonts-emoji
  }:
  
  let
    version = "12.1.2";
  
    twemojiSrc = fetchFromGitHub {
      name = "twemoji";
  