anchor.diff:    src = fetchurl {
       url = "mirror://sourceforge/rhash/rhash/${version}/${name}-src.tar.gz";
       hashOutput = false;
  -    sha256 = "964df972b60569b5cb35ec989ced195ab8ea514fc46a74eab98e86569ffbcf92";
  +    sha256 = "a2441b7a04ae554ddd3eafcf50365c787b012e35ee6402eb6705d9cd4b8dfa65";
     };
   
     buildInputs = [
  
positive.code: }:
  
  let
    version = "1.3.6";
  in
  stdenv.mkDerivation rec {
    name = "rhash-${version}";
  
negative.code: 
    preInstall = ''
      installFlagsArray+=("SYSCONFDIR=$out/etc")
    '';
  
    installTargets = [
      "install"
      "install-pkg-config"
      "install-lib-headers"
      "install-lib-so-link"
    ];
  
    passthru = {
      srcVerification = fetchurl {
        failEarly = true;
        inherit (src)
          urls
          outputHash
          outputHashAlgo;
        fullOpts = {
          pgpsigUrls = map (n: "${n}.asc") src.urls;
          pgpKeyFingerprint = "2875 F6B1 C2D2 7A4F 0C8A  F60B 2A71 4497 E373 63AE";
        };
      };
    };
  
  