Mark BROKEN: fails to build

../include/pbcopper/json/internal/json.hpp:1229:9: error: static_assert failed due to requirement 'sizeof(nlohmann::basic_json<std::map, std::vector, std::__1::basic_string<char>, bool, long, unsigned long, double, std::allocator, adl_serializer>) == 0' "could not find from_json() method in T's namespace"

static_assert(sizeof(BasicJsonType) == 0,
^             ~~~~~~~~~~~~~~~~~~~~~~~~~~

Reported by: pkg-fallout