anchor.diff:      "--sysconfdir=/etc"
       "--enable-pie"
       "--enable-relro-now"
  +    "--enable-subnet"
  +    "--enable-tfo-client"
  +    "--enable-tfo-server"
  +    "--enable-systemd"
       "--enable-dnstap"
  +    "--enable-dnscrypt"
  +    "--enable-cachedb"
       "--with-dnstap-socket-path=/run/dnstap.sock"
  +    "--with-pthreads"
     ];
   
     preInstall = ''
  
positive.code:   passthru = {
      srcVerification = fetchurl rec {
        failEarly = true;
        urls = tarballUrls "1.6.1";
        pgpsigUrls = map (n: "${n}.asc") urls;
        pgpKeyFingerprint = "EDFA A3F2 CA4E 6EB0 5681  AF8E 9F6F 1C2D 7E04 5F8D";
        inherit (src) outputHashAlgo;
        outputHash = "42df63f743c0fe8424aeafcf003ad4b880b46c14149d696057313f5c1ef51400";
      };
    };
  
  
negative.code: , expat
  , fstrm
  , libevent
  , libsodium
  , openssl
  , protobuf-c
  , systemd_lib
  }:
  
  let
  