anchor.diff:  { stdenv
  -, autoreconfHook
  -, fetchFromGitHub
  +, fetchurl
   , python
   
   , openssl
   }:
   
   let
  -  version = "2.1.7-rc";
  +  version = "2.1.8";
   
     tarballUrls = version: [
       "https://github.com/libevent/libevent/releases/download/release-${version}-stable/libevent-${version}-stable.tar.gz"
  
positive.code:     "--disable-samples"
    ];
  
    /*passthru = {
      srcVerification = fetchurl rec {
        failEarly = true;
        urls = tarballUrls "2.0.22";
        pgpsigUrls = map (n: "${n}.asc") urls;
        pgpKeyFingerprint = "B35B F85B F194 89D0 4E28  C33C 2119 4EBB 1657 33EA";
        inherit (src) outputHashAlgo;
        outputHash = "18qz9qfwrkakmazdlwxvjmw8p76g70n3faikwvdwznns1agw9hki";
      };
    };*/
  
    meta = with stdenv.lib; {
      description = "Event notification library";
  
negative.code: stdenv.mkDerivation rec {
    name = "libevent-${version}";
  
    src = fetchurl {
      urls = tarballUrls version;
      hashOutput = false;
      sha256 = "965cc5a8bb46ce4199a47e9b2c9e1cae3b137e8356ffdad6d94d3b9069b71dc2";
    };
  
    nativeBuildInputs = [
      python
    ];
  
  