anchor.diff:  , epoxy
   , json-glib
   , libxkbcommon
  +, libxml2
   , gmp
   , gnome3
   , gsettings-desktop-schemas
  
positive.code:   NIX_CFLAGS_COMPILE = "-DG_ENABLE_DEBUG -DG_DISABLE_CAST_CHECKS";
  
    postPatch = ''
      # TODO: Remove in 3.24.21
      # https://gitlab.gnome.org/GNOME/gtk/issues/2669
      echo "${stdenv.shell}" > check-version.py
      chmod +x check-version.py
  
      files=(
        build-aux/meson/post-install.py
        demos/gtk-demo/geninclude.py
  
negative.code:     docbook_xml_dtd_43
      docbook_xsl
      gtk-doc
      # For xmllint
      libxml2
    ];
  
    buildInputs = [
  