anchor.diff:    gio2 = attrs: {
       nativeBuildInputs = [ pkg-config ]
         ++ lib.optionals stdenv.isDarwin [ DarwinTools ];
  -    buildInputs = [ gtk2 pcre gobject-introspection ] ++ lib.optionals stdenv.isLinux [ util-linux libselinux libsepol ];
  +    buildInputs = [ gtk2 pcre pcre2 gobject-introspection ] ++ lib.optionals stdenv.isLinux [ util-linux libselinux libsepol ];
     };
   
     gitlab-markup = attrs: { meta.priority = 1; };
  
positive.code:       pkg-config
        fribidi
        harfbuzz
        pcre
        xorg.libpthreadstubs
        xorg.libXdmcp
      ] ++ lib.optionals stdenv.isDarwin [ DarwinTools ];
  
negative.code:       harfbuzz
        libdatrie
        libthai
        pcre pcre2
        xorg.libpthreadstubs
        xorg.libXdmcp
      ];
  