anchor.diff:  
     postPatch = ''
       substituteInPlace dnsrecon.py \
  -      --replace "namelist.txt" "../share/namelist.txt" \
  -      --replace "0.9.0" "${version}"
  +      --replace "namelist.txt" "../share/namelist.txt"
     '';
   
     installPhase = ''
  
positive.code: { lib, fetchFromGitHub, python3 }:
  
  python3.pkgs.buildPythonApplication rec {
    pname = "dnsrecon";
    version = "0.9.1";
  
    src = fetchFromGitHub {
      owner = "darkoperator";
  
negative.code:   meta = with lib; {
      description = "DNS Enumeration Script";
      homepage = "https://github.com/darkoperator/dnsrecon";
      license = licenses.gpl2Only;
      platforms = platforms.all;
      maintainers = with maintainers; [ c0bw3b fab ];
    };
  }
  