anchor.diff:      xorg.libXpm
       libxrandr
       libxrender
  +    systemd_lib
       ncurses
       xorgproto
       zlib
  
positive.code: 
  , acl
  , alsa-lib
  , dbus
  , fontconfig
  , freetype
  
negative.code:     cp ${./site-start.el} $out/share/emacs/site-lisp/site-start.el
    '';
  
    passthru = {
      srcVerification = fetchurl {
        failEarly = true;
  