makepkg pokerth with boost 1.71 works fine w. 1.69

/usr/include/c++/9.2.0/bits/unordered_set.h:1703:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/boost/asio/executor.hpp:338,
                 from /usr/include/boost/asio/basic_socket.hpp:27,
                 from /usr/include/boost/asio/basic_datagram_socket.hpp:20,
                 from /usr/include/boost/asio.hpp:24,
                 from src/net/chatcleanermanager.h:36,
                 from src/net/common/chatcleanermanager.cpp:32:
/usr/include/boost/asio/impl/executor.hpp:218:22: note:   ‘const std::reference_wrapper<boost::asio::io_context>’ is not derived from ‘const std::unordered_set<_Value, _Hash, _Pred, _Alloc>’
  218 |     return executor_ == *static_cast<const Executor*>(e->target());
      |            ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/9.2.0/unordered_set:47,
                 from /usr/include/google/protobuf/stubs/hash.h:40,
                 from /usr/include/google/protobuf/stubs/stringpiece.h:152,
                 from /usr/include/google/protobuf/stubs/strutil.h:39,
                 from /usr/include/google/protobuf/message_lite.h:49,
                 from /usr/include/google/protobuf/wire_format_lite_inl.h:45,
                 from /usr/include/google/protobuf/map_type_handler.h:35,
                 from /usr/include/google/protobuf/map.h:49,
                 from /usr/include/google/protobuf/generated_message_table_driven.h:34,
                 from src/third_party/protobuf/chatcleaner.pb.h:26,
                 from src/net/common/chatcleanermanager.cpp:36:
/usr/include/c++/9.2.0/bits/unordered_set.h:1715:5: note: candidate: ‘template<class _Value, class _Hash, class _Pred, class _Alloc> bool std::operator==(const std::unordered_multiset<_Value, _Hash, _Pred, _Alloc>&, const std::unordered_multiset<_Value, _Hash, _Pred, _Alloc>&)’
 1715 |     operator==(const unordered_multiset<_Value, _Hash, _Pred, _Alloc>& __x,
      |     ^~~~~~~~
/usr/include/c++/9.2.0/bits/unordered_set.h:1715:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/boost/asio/executor.hpp:338,
                 from /usr/include/boost/asio/basic_socket.hpp:27,
                 from /usr/include/boost/asio/basic_datagram_socket.hpp:20,
                 from /usr/include/boost/asio.hpp:24,
                 from src/net/chatcleanermanager.h:36,
                 from src/net/common/chatcleanermanager.cpp:32:
/usr/include/boost/asio/impl/executor.hpp:218:22: note:   ‘const std::reference_wrapper<boost::asio::io_context>’ is not derived from ‘const std::unordered_multiset<_Value, _Hash, _Pred, _Alloc>’
  218 |     return executor_ == *static_cast<const Executor*>(e->target());
      |            ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
make[1]: *** [Makefile.pokerth_lib:1571: obj/chatcleanermanager.o] Error 1
make[1]: Leaving directory '/tmp/pokerth/pokerth/src/pokerth-1.1.2-rc'
make: *** [Makefile:105: sub-pokerth_lib-pro-make_first-ordered] Error 2
==> ERROR: A failure occurred in build().