anchor.diff:    inherit name;
   
     src = fetchurl {
  -    urls = tarballUrls "4171";
  +    urls = tarballUrls "4187";
       hashOutput = false;
  -    multihash = "QmZvuvFEBVHAXC25QuuA7uV63VRbtuugh263iezUtZpQtP";
  -    sha256 = "62cb73c6c009c9799c526f05a05e25f00f0ad86d50f82a714dedcfbf4a7e4176";
  +    multihash = "QmVM64rBRX3XM1K5aDoSTQdGtsF2xJoWeK7CmYionkdiJG";
  +    sha256 = "6b062b4ce0f04d6838d58e6faa255ba05222bd8ecb57a2d1116fdbe22f253609";
     };
   
     nativeBuildInputs = [
  
positive.code:   passthru = {
      srcVerification = fetchurl rec {
        failEarly = true;
        pgpsigUrls = map (n: "${n}.asc") (tarballUrls "4172");
        pgpKeyFingerprint = "F5E1 1B9F FE91 1146 F41D  953D 78A1 B4DF E8F9 C57E";
        inherit (src) urls outputHashAlgo outputHash;
      };
  
negative.code: }:
  
  let
    name = "ccid-1.4.25";
  
    tarballUrls = id: [
      "https://alioth.debian.org/frs/download.php/file/${id}/${name}.tar.bz2"
  