anchor.diff:      optionals
       optionalString;
   
  -  version = "4.8.5";
  +  version = "4.9.4";
     name = "samba${if isClient then "-client" else ""}-${version}";
   
     tarballUrls = [
  
positive.code:     wrapPythonPrograms $out/bin
    '';
  
    # FIXME
    buildDirCheck = false;
  
    passthru = rec {
      srcVerification = fetchurl {
        failEarly = true;
  
negative.code:     # wscript options
      "--with-system-mitkrb5" "${krb5_full}"
      "--with-system-mitkdc" "${krb5_full}/bin/krb5kdc"
      "--with-experimental-mit-ad-dc"
    ];
  
    preInstall = ''
      wafInstallFlagsArray+=('--destdir' "$out")
    '';
  
    postInstall = ''
      dir="$out/$out"
      mv "$out/$out"/* "$out"
      while [ "$out" != "$dir" ]; do
  