anchor.diff:  }:
   
   let
  -  version = "12.1.2";
  +  version = "12.1.5";
   
     twemojiSrc = fetchFromGitHub {
       name = "twemoji";
       owner = "twitter";
       repo = "twemoji";
       rev = "v${version}";
  -    sha256 = "0vzmlp83vnk4njcfkn03jcc1vkg2rf12zf5kj3p3a373xr4ds1zn";
  +    hash = "sha256-qb3bLiUgtA8QQ13u928kvM+3qwmQpyjUk0EPKja1kSk=";
     };
   
   in
  
positive.code:   ];
  
    patches = [
      # ImageMagick -> GrahphicsMagick
      (fetchpatch {
        url = "https://src.fedoraproject.org/rpms/twitter-twemoji-fonts/raw/3bc176c10ced2824fe03da5ff561e22a36bf8ccd/f/noto-emoji-use-gm.patch";
        sha256 = "0yfmfzaaiq5163c06172g4r734aysiqyv1s28siv642vqzsqh4i2";
      })
    ];
  
  
negative.code: # Based upon https://src.fedoraproject.org/rpms/twitter-twemoji-fonts
  # The main difference is that we use “Twitter Color Emoji” name (which is recognized by upstream fontconfig)
  
  { stdenv
  