anchor.diff:  , docbook-xsl
   , fetchurl
   , libxslt
  -, python
  +, python3
   , samba_full
   
   , ncurses
  
positive.code:   src = fetchurl {
      urls = map (n: "${n}.gz") tarballUrls;
      hashOutput = false;
      sha256 = "6a3fc2616567f23993984ada3cea97d953a27669ffd1bfbbe961f26e0cf96cc5";
    };
  
    nativeBuildInputs = [
      docbook_xml_dtd_42
      docbook-xsl
      libxslt
      python
    ];
  
    buildInputs = [
  
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;
        inherit (src)
          urls
          outputHash
          outputHashAlgo;
        fullOpts = {
          pgpsigUrls = map (n: "${n}.asc") tarballUrls;
          pgpDecompress = true;
          inherit (samba_full.pgp.library) pgpKeyFingerprint;
        };
      };
    };
  
  