anchor.diff:      "--disable-sanitize-undefined"
     ];
   
  +  passthru = {
  +    srcVerified = fetchurl rec {
  +      failEarly = true;
  +      urls = tarballUrls "0.166";
  +      pgpsigUrls = map (n: "${n}.sig") urls;
  +      pgpKeyId = "57816A6A";
  +      pgpKeyFingerprint = "47CC 0331 081B 8BC6 D0FD  4DA0 8370 665B 5781 6A6A ";
  +      inherit (src) outputHashAlgo;
  +      outputHash = "3c056914c8a438b210be0d790463b960fc79d234c3f05ce707cbff80e94cba30";
  +    };
  +  };
  +
     meta = with stdenv.lib; {
       description = "Libraries/utilities to handle ELF objects";
       homepage = https://fedorahosted.org/elfutils/;
  
positive.code:   version = "0.166";
  
    src = fetchurl {
      urls = [
        "https://fedorahosted.org/releases/e/l/elfutils/${version}/${name}.tar.bz2"
        "mirror://gentoo/${name}.tar.bz2"
      ];
      sha256 = "3c056914c8a438b210be0d790463b960fc79d234c3f05ce707cbff80e94cba30";
    };
  
  
negative.code:   inherit (stdenv.lib)
      optionals
      optionalString;
  
    tarballUrls = version: [
      "https://fedorahosted.org/releases/e/l/elfutils/${version}/elfutils-${version}.tar.bz2"
      "mirror://gentoo/elfutils-${version}.tar.bz2"
    ];
  in
  
  stdenv.mkDerivation rec {
  