anchor.diff:    configureFlags = [
       "--sysconfdir=/etc"
       "--localstatedir=/var"
  -    #"--enable-snmp"
  -    #"--enable-snmp-keepalived"
  -    #"--enable-snmp-checker"
  -    #"--enable-snmp-rfc"
  -    #"--enable-snmp-rfcv2"
  -    #"--enable-snmp-rfcv3"
  +    "--enable-snmp"
  +    "--enable-snmp-keepalived"
  +    "--enable-snmp-checker"
  +    "--enable-snmp-rfc"
  +    "--enable-snmp-rfcv2"
  +    "--enable-snmp-rfcv3"
       "--enable-sha1"
     ];
   
  -  installFlags = [
  -    "sysconfdir=\${out}/etc"
  -  ];
  +  preInstall = ''
  +    installFlagsArray+=("sysconfdir=$out/etc")
  +  '';
   
     meta = with stdenv.lib; {
       homepage = http://keepalived.org;
  
positive.code: { stdenv
  , fetchFromGitHub
  
  , ipset
  , iptables
  
negative.code: }:
  
  stdenv.mkDerivation rec {
    name = "keepalived-1.2.23";
  
    src = fetchurl {
      url = "http://keepalived.org/software/${name}.tar.gz";
      multihash = "QmRwvzN1VhvXf56BBr9GTxeepDRnLJ9fMk4Yg18cTN9rk3";
      sha256 = "046rfl2fpzqkdy3ahg2ca8qpvdd02d0zib47m80yiwqgy6y35r0r";
    };
  
    buildInputs = [
  