anchor.diff:      rev = "v${version}";
       fetchSubmodules = true;
       sha256 = if unfree
  -      then "1zgsr03d4vwdj2qyiwfwfqsbqngp85n13i3xwbkfkbja036c5yhc"
  +      then "1ldi7zikl1g6rq3g9lkypx5wqzza5j0054j1r8bh7lyvb0szicig"
         else "0gd49lns2bpzbkwax5jf9x1xmg1j8ij997kcxr2596cwiswnw4di";
     };
   
  
positive.code:     curl freetype giflib libjpeg libpng libwebp pixman tinyxml zlib
      libX11 libXext libXcursor libXxf86vm
    ] ++ lib.optionals unfree [ cmark ];
  
    cmakeFlags = [
      "-DENABLE_UPDATER=OFF"
  
negative.code: 
  stdenv.mkDerivation rec {
    name = "aseprite-${version}";
    version = if unfree then "1.2.2" else "1.1.7";
  
    src = fetchFromGitHub {
      owner = "aseprite";
  