anchor.diff:      "mirror://kernel/linux/utils/fs/xfs/xfsprogs/xfsprogs-${version}.tar"
     ];
   
  -  version = "4.17.0";
  +  version = "4.18.0";
   in
   stdenv.mkDerivation rec {
     name = "xfsprogs-${version}";
  
positive.code:         outputHash
          outputHashAlgo
          urls;
        pgpsigUrl = map (n: "${n}.sign") (tarballUrls version);
        pgpKeyFingerprints = [
          # Dave Chinner
          "9893 A827 C19F 7D96 164A  38FF ADE8 2947 F475 FA1D"
          # Eric R. Sandeen
          "2B81 8591 9E8D 2489 8186  9DED 20AE 1692 E13D DEE0"
        ];
        failEarly = true;
        pgpDecompress = true;
      };
    };
  
  
negative.code:   src = fetchurl {
      urls = map (n: "${n}.xz") (tarballUrls version);
      hashOutput = false;
      sha256 = "397dc96f51aeeff73d021d3418d3172377b2685f2740ca60525096c070aa3df1";
    };
  
    nativeBuildInputs = [
  