anchor.diff:  , libxkbcommon
   , libxrandr
   , libxrender
  -, mesa_noglu
  +, opengl-dummy
   , pango
   , rest
   , shared-mime-info
  
positive.code:     "--enable-largefile"
      "--disable-debug"
      "--disable-installed-tests"
      "--${boolEn (libxkbcommon != null)}-xkb"
      "--${boolEn (libxinerama != null)}-xinerama"
      "--${boolEn (libxrandr != null)}-xrandr"
      "--${boolEn (libxfixes != null)}-xfixes"
      "--${boolEn (libxcomposite != null)}-xcomposite"
      "--${boolEn (libxdamage != null)}-xdamage"
      "--${boolEn (libx11 != null)}-x11-backend"
      "--disable-win32-backend"
      "--disable-quartz-backend"
      "--${boolEn true}-broadway-backend"
      "--${boolEn (
        wayland != null
        && wayland-protocols != null)}-wayland-backend"
      "--disable-mir-backend"
      "--disable-quartz-relocation"
      #"--enable-explicit-deps"
  
negative.code:     "--${boolEn (rest != null && json-glib != null)}-cloudprint"
      "--${boolEn (cups != null)}-test-print-backend"
      "--enable-schemas-compile"
      "--enable-introspection"
      "--enable-colord"
      "--disable-gtk-doc"
      "--disable-gtk-doc-html"
      "--disable-gtk-doc-pdf"
      "--disable-man"
      "--disable-doc-cross-references"
      "--enable-Bsymbolic"
      "--${boolWt x11_backend}-x"
    ];
  
    postInstall = "rm -rvf $out/share/gtk-doc";
  