anchor.diff:    configureFlags = [
       "--disable-debug"
       "--with-werror"
  -    "--disable-static-link"
  +    # Flag is not a boolean
  +    #"--disable-static-link"
       "--with-pythonpath"
       # Flag is not a boolean
       "--with-gtest-source=${googletest}/src/gtest"
  
positive.code:   };
  
    nativeBuildInputs = [
      perl
      bc
    ];
  
    buildInputs = [
  
negative.code:     "--disable-logger-checks"
    ];
  
    makeFlags = [
      # Spoof libtool since googletest no longer provides libtool files.
      "GTEST_LDADD=${googletest}/lib/libgtest.so"
    ];
  
    CXXFLAGS = "-std=c++11";
  
    preFixup = ''
      sed -i 's,openssl-1.0.0,openssl,g' $out/lib/pkgconfig/dns++.pc
    '';
  