anchor.diff:    src = fetchurl {
       urls = map (n: "${n}.gz") (tarballUrls version);
       hashOutput = false;
  -    sha256 = "9e464550d995c6445045a2a8135db81b7d54e9e95163f337c745f7a89c7d0d62";
  +    sha256 = "f68d0fcc616119d27ebace162499e73f4ae3998e49b98d1f454bb467cdb1d4e6";
     };
   
     nativeBuildInputs = [
  
positive.code:       failEarly = true;
        urls = map (n: "${n}.gz") (tarballUrls newVersion);
        inherit (src) outputHashAlgo;
        outputHash = "9e464550d995c6445045a2a8135db81b7d54e9e95163f337c745f7a89c7d0d62";
        fullOpts = {
          pgpsigUrls = map (n: "${n}.asc") (tarballUrls newVersion);
          pgpDecompress = true;
  
negative.code: }:
  
  let
    version = "0.9.39";
    newVersion = "0.9.39";
  
    tarballUrls = version: [
      "mirror://samba/tevent/tevent-${version}.tar"
  