anchor.diff:    src = fetchurl {
       urls = map (n: "${n}.gz") (tarballUrls version);
       hashOutput = false;
  -    sha256 = "b185602756a628bac507fa8af8b9df92ace69d27c0add5dab93190ad7c3367ce";
  +    sha256 = "9e7ada780e483ebbf27080a76a73413cfa6344df9ad280f812014c68b7c368dc";
     };
   
     nativeBuildInputs = [
       docbook-xsl
       docbook_xml_dtd_42
       libxslt
  -    python2
  +    python3
     ];
   
  -  preConfigure = ''
  +  postPatch = ''
       patchShebangs buildtools/bin/waf
     '';
   
  
positive.code: , fetchurl
  , lib
  , libxslt
  , python2
  , samba_full
  }:
  
  let
    version = "2.1.14";
    newVersion = "2.1.14";
  
    tarballUrls = version: [
      "mirror://samba/talloc/talloc-${version}.tar"
  
negative.code:     "--builtin-libraries=replace"
    ];
  
    buildPhase = ''
      buildtools/bin/waf build -j $NIX_BUILD_CORES
    '';
  
    installPhase = ''
      buildtools/bin/waf install -j $NIX_BUILD_CORES
    '';
  
    passthru = {
      srcVerification = fetchurl {
        failEarly = true;
        urls = map (n: "${n}.gz") (tarballUrls newVersion);
        inherit (src) outputHashAlgo;
        outputHash = "9e7ada780e483ebbf27080a76a73413cfa6344df9ad280f812014c68b7c368dc";
        fullOpts = {
          pgpsigUrls = map (n: "${n}.asc") (tarballUrls newVersion);
          pgpDecompress = true;
          inherit (samba_full.pgp.library) pgpKeyFingerprint;
        };
      };
    };
  
  