anchor.diff:  
   rustPlatform.buildRustPackage rec {
     pname = "mdcat";
  -  version = "0.22.2";
  +  version = "0.23.0";
   
     src = fetchFromGitHub {
       owner = "lunaryorn";
       repo = pname;
       rev = "mdcat-${version}";
  -    hash = "sha256-i36MYTMkbSuWxxlWUDsyYMay/4Mg7M5jEFhHM60UrkM=";
  +    hash = "sha256-bGXuYGQyrXa9gUEQfB7BF9K04z88r1UoM8R5gpL2nRM=";
     };
   
     nativeBuildInputs = [ pkg-config asciidoctor installShellFiles ];
  -  buildInputs = [ openssl ] ++ lib.optional stdenv.isDarwin Security;
  +  buildInputs = [ openssl ]
  +    ++ lib.optional stdenv.isDarwin Security;
   
  -  cargoSha256 = "sha256-y9yg4EQDL+RcD6NI7n6W/Hi6Tw4Wr1Kf6hbcIuidIf4=";
  +  cargoSha256 = "sha256-hmv4LNk7NEYjT/5XXUpMd+xGS19KHOW+HIgsiFEWeig=";
   
     checkInputs = [ ansi2html ];
     # Skip tests that use the network and that include files.
  
positive.code:     "--skip magic::tests::detect_mimetype_of_magic_param_bytes_max_length"
      "--skip magic::tests::detect_mimetype_of_png_image"
      "--skip magic::tests::detect_mimetype_of_svg_image"
      "--skip resources::tests::read_url_with_http_url_fails_when_status_404"
      "--skip resources::tests::read_url_with_http_url_returns_content_when_status_200"
      "--skip iterm2_tests_render_md_samples_images_md"
  
negative.code: { lib
  , stdenv
  , fetchFromGitHub
  , rustPlatform
  , pkg-config
  