anchor.diff:    src = fetchurl {
       urls = map (n: "${n}.gz") (tarballUrls version);
       hashOutput = false;
  -    sha256 = "639eb35556a0af999123c4d883e79be05ff9f00ab4f9e4ac2e5775f9c5eeeed3";
  +    sha256 = "987c0cf6815e948d20caaca04eba9b823e67773f361ffafe676e24b953cc604b";
     };
   
     nativeBuildInputs = [
  
positive.code:       pgpDecompress = true;
        inherit (samba_full.pgp.library) pgpKeyFingerprint;
        inherit (src) outputHashAlgo;
        outputHash = "639eb35556a0af999123c4d883e79be05ff9f00ab4f9e4ac2e5775f9c5eeeed3";
      };
    };
  
  
negative.code: }:
  
  let
    version = "2.1.12";
    newVersion = "2.1.12";
  
    tarballUrls = version: [
      "mirror://samba/talloc/talloc-${version}.tar"
  