anchor.diff:    passthru = {
       srcVerification = fetchurl rec {
         failEarly = true;
  -      urls = tarballUrls "1.47.7";
  +      urls = tarballUrls "1.47.8";
         pgpsigUrls = map (n: "${n}.sig") urls;
         pgpKeyFingerprint = "87EA 44D1 50D8 9615 E39A  3FEE F0DC 8E00 B28C 5995";
         inherit (src) outputHashAlgo;
  -      outputHash = "585b8e88ed04bdb426403cf7d9b0c0bb9c7630755b0096c2b018a024b29bec0d";
  +      outputHash = "528f6a81ad34cbc76aa7dce5a82f8b3d2078ef065271ab81fda033842018a8dc";
       };
     };
   
  
positive.code: }:
  
  let
    version = "1.47.7";
  
    tarballUrls = version: [
      "mirror://gnu/help2man/help2man-${version}.tar.xz"
  
negative.code:   src = fetchurl {
      urls = tarballUrls version;
      hashOutput = false;
      sha256 = "528f6a81ad34cbc76aa7dce5a82f8b3d2078ef065271ab81fda033842018a8dc";
    };
  
    nativeBuildInputs = [
      gettext
      makeWrapper
    ];
  
    buildInputs = [
      perlPackages.perl
    ];
  
    postInstall = ''
  