anchor.diff:    tarballUrls = base: patch: map (n: "${n}/util-linux-${version base patch}.tar") (baseUrls base);
   
     base = "2.33";
  -  patch = null;
  +  patch = "1";
   in
   stdenv.mkDerivation rec {
     name = "${type}util-linux-${version base patch}";
  
positive.code:   src = fetchurl {
      urls = map (n: "${n}.xz") (tarballUrls base patch);
      hashOutput = false;
      sha256 = "f261b9d73c35bfeeea04d26941ac47ee1df937bd3b0583e748217c1ea423658a";
    };
  
    buildInputs = optionals (!libOnly) [
  
negative.code:   passthru = {
      srcVerification = fetchurl {
        failEarly = true;
        urls = map (n: "${n}.xz") (tarballUrls "2.33" "1");
        outputHash = "c14bd9f3b6e1792b90db87696e87ec643f9d63efa0a424f092a5a6b2f2dbef21";
        inherit (src) outputHashAlgo;
        fullOpts = {
          pgpsigUrls = map (n: "${n}.sign") (tarballUrls base patch);
  