anchor.diff:  , fetchurl
   , libxslt
   , python2
  +, samba_full
   
   , ncurses
   , readline
   , talloc
   }:
   
  +let
  +  version = "0.9.28";
  +  newVersion = "0.9.28";
  +
  +  tarballUrls = version: [
  +    "mirror://samba/tevent/tevent-${version}.tar"
  +  ];
  +in
   stdenv.mkDerivation rec {
  -  name = "tevent-0.9.28";
  +  name = "tevent-${version}";
   
     src = fetchurl {
  -    url = "mirror://samba/tevent/${name}.tar.gz";
  +    urls = map (n: "${n}.gz") (tarballUrls version);
  +    allowHashOutput = false;
       sha256 = "0a9ml52jjnzz7qg9z750mavlvs1yibjwrzy4yl55dc95j0vm7n84";
     };
   
  
positive.code:       wkennington
      ];
      platforms = with platforms;
        i686-linux
        ++ x86_64-linux;
    };
  }
  
negative.code:     "--builtin-libraries=replace"
    ];
  
    passthru = {
      srcVerified = fetchurl {
        failEarly = true;
        urls = map (n: "${n}.gz") (tarballUrls newVersion);
        pgpsigUrls = map (n: "${n}.asc") (tarballUrls newVersion);
        pgpDecompress = true;
        inherit (samba_full.pgp.library) pgpKeyFingerprint;
        inherit (src) outputHashAlgo;
        outputHash = "0a9ml52jjnzz7qg9z750mavlvs1yibjwrzy4yl55dc95j0vm7n84";
      };
    };
  
    meta = with stdenv.lib; {
      description = "An event system based on the talloc memory management library";
      homepage = http://tevent.samba.org/;
  