anchor.diff:  , openssl
   , pcre
   , perl
  -, prometheus-cpp
   , python2
   , re2
   , zlib
  
positive.code:     ln -s ${nlohmann_json.src}/single_include/nlohmann/json.hpp .
      popd
  
      pushd prometheus-cpp/prometheus-cpp/3rdparty
      replace_dep . "${civetweb.src}" civetweb
      popd
  
      sed -i s_/usr/bin/env_${coreutils}/bin/env_g libssl/openssl/config
  
negative.code:         { f = "libssl"; p = openssl; }
          { f = "lz4"; p = lz4; }
          { f = "pcre"; p = pcre; }
          { f = "re2"; p = re2; }
      ]}
  
  