anchor.diff: -{ stdenv, fetchurl, pythonPackages, unzip }:
  +{ stdenv, fetchurl, pythonPackages, unzip, gamin }:
   
   let version = "0.8.6"; in
   
   pythonPackages.buildPythonPackage {
     name = "fail2ban-${version}";
  +  namePrefix = "";
   
     src = fetchurl {
       url = "https://github.com/fail2ban/fail2ban/zipball/${version}";
  
positive.code:   };
  
    buildInputs = [ unzip ];
  
    preConfigure =
      ''
  
negative.code:   installCommand =
      ''
        python setup.py install --prefix=$out
      '';
  
    meta = {
  