anchor.diff: -{ stdenv, fetchurl, zlib, bzip2, libiconv, libxml2, openssl, ncurses, curl }:
  +{ stdenv, fetchurl, zlib, bzip2, libiconv, libxml2, openssl, ncurses, curl
  +, libmilter }:
   stdenv.mkDerivation rec {
     name = "clamav-${version}";
     version = "0.98.6";
  
positive.code:     "--with-openssl=${openssl}"
      "--with-libncurses-prefix=${ncurses}"
      "--with-libcurl=${curl}"
      "--disable-clamav"
    ];
  
  
negative.code:     sha256 = "0l99a0shgzpl8rvrrgbm1ki2zxlb7g1n82bhq7f2snj4amfj94b5";
    };
  
    buildInputs = [ zlib bzip2 libxml2 openssl ncurses curl libiconv libmilter ];
  
    configureFlags = [
      "--with-zlib=${zlib}"
  