anchor.diff:  , pkgconfig
   , openconnect
   , file
  -, gawk,
     openvpn
   , vpnc
   , glib
  
positive.code: , iptables
  , gnutls
  , polkit,
    wpa_supplicant
  , readline6
  , pptp
  , ppp
  
negative.code:   nativeBuildInputs = [
      pkgconfig
      file
    ];
  
    preConfigure = ''
      export PPPD=${ppp}/sbin/pppd
      sed -i "s/\/usr\/bin\/file/file/g" ./configure
    '';
  
  