anchor.diff:    passthru = {
       srcVerification = fetchurl rec {
         failEarly = true;
  -      urls = tarballUrls "7.62.0";
  +      urls = tarballUrls "7.63.0";
         fullOpts = {
           pgpsigUrls = map (n: "${n}.asc") urls;
           pgpKeyFingerprint = "27ED EAF2 2F3A BCEB 50DB  9A12 5CC9 08FD B71E 12C2";
         };
         inherit (src) outputHashAlgo;
  -      outputHash = "7802c54076500be500b171fde786258579d60547a3a35b8c5a23d8c88e8f9620";
  +      outputHash = "9bab7ed4ecff77020a312d84cc5fb7eb02d58419d218f267477a724a17fd8dd8";
       };
     };
   
  
positive.code:     "https://curl.haxx.se/download/curl-${version}.tar.bz2"
    ];
  
    version = "7.62.0";
  in
  stdenv.mkDerivation rec {
    name = "curl-${version}";
  
    src = fetchurl {
      urls = tarballUrls version;
      multihash = "QmeRsJZNyfu1bjU4ETzCtaKNKVxsM2mFFc2xtGVSwKCAsY";
      hashOutput = false;
      sha256 = "7802c54076500be500b171fde786258579d60547a3a35b8c5a23d8c88e8f9620";
    };
  
    buildInputs = [
  
negative.code:     "--sysconfdir=/etc"
      "--localstatedir=/var"
      "--enable-ares"
      "--with-ca-bundle=/etc/ssl/certs/ca-certificates.crt"
      "--with-ca-path=/etc/ssl/certs"
      "--with-ca-fallback"
  