anchor.diff:        mkdir -p $out/empty
       '';
   
  +  enableParallelBuilding = true;
  +
     postInstall =
       ''
         # Install ssh-copy-id, it's very useful.
  
positive.code: in
  
  stdenv.mkDerivation rec {
    name = "openssh-6.6p1";
  
    src = fetchurl {
      url = "http://ftp.nluug.nl/pub/OpenBSD/OpenSSH/portable/${name}.tar.gz";
      sha256 = "1fq3w86q05y5nn6z878wm312k0svaprw8k007188fd259dkg1ha8";
    };
  
    prePatch = stdenv.lib.optionalString hpnSupport
  
negative.code:       export NIX_LDFLAGS="$NIX_LDFLAGS -lgcc_s"
      '';
  
    patches = [ ./locale_archive.patch ];
  
    buildInputs = [ zlib openssl libedit pkgconfig pam ]
      ++ stdenv.lib.optional withKerberos [ kerberos ];
  