anchor.diff:  }:
   
   let
  -  version = "2.1.9";
  -  channel = "beta";
  +  version = "2.1.10";
  +  channel = "stable";
   
     tarballUrls = version: [
       "https://github.com/libevent/libevent/releases/download/release-${version}/libevent-${version}.tar.gz"
  
positive.code:     python3  # For event_rpcgen.py
    ];
  
    configureFlags = [
      "--enable-gcc-hardening"
      "--disable-samples"
    ];
  
    passthru = {
      srcVerification = fetchurl rec {
        failEarly = true;
        urls = tarballUrls "2.1.9-beta";
        inherit (src)
          outputHashAlgo;
        outputHash = "eeb4c6eb2c4021e22d6278cdcd02815470243ed81077be0cbd0f233fa6fc07e8";
        fullOpts = {
          pgpsigUrls = map (n: "${n}.asc") urls;
          pgpKeyFingerprints = [
  
negative.code:   src = fetchurl {
      urls = tarballUrls "${version}-${channel}";
      hashOutput = false;
      sha256 = "e864af41a336bb11dab1a23f32993afe963c1f69618bd9292b89ecf6904845b0";
    };
  
    buildInputs = [
  