/usr/include/boost/archive/detail/ is in libboost1.54-dev 1.54.0-4ubuntu3.
This file is owned by root:root, with mode 0o755.
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/usr/include/boost/archive/detail/abi_prefix.hpp
/usr/include/boost/archive/detail/abi_suffix.hpp
/usr/include/boost/archive/detail/archive_serializer_map.hpp
/usr/include/boost/archive/detail/auto_link_archive.hpp
/usr/include/boost/archive/detail/auto_link_warchive.hpp
/usr/include/boost/archive/detail/basic_archive_impl.hpp
/usr/include/boost/archive/detail/basic_config.hpp
/usr/include/boost/archive/detail/basic_iarchive.hpp
/usr/include/boost/archive/detail/basic_iserializer.hpp
/usr/include/boost/archive/detail/basic_oarchive.hpp
/usr/include/boost/archive/detail/basic_oserializer.hpp
/usr/include/boost/archive/detail/basic_pointer_iserializer.hpp
/usr/include/boost/archive/detail/basic_pointer_oserializer.hpp
/usr/include/boost/archive/detail/basic_serializer.hpp
/usr/include/boost/archive/detail/basic_serializer_map.hpp
/usr/include/boost/archive/detail/check.hpp
/usr/include/boost/archive/detail/common_iarchive.hpp
/usr/include/boost/archive/detail/common_oarchive.hpp
/usr/include/boost/archive/detail/decl.hpp
/usr/include/boost/archive/detail/interface_iarchive.hpp
/usr/include/boost/archive/detail/interface_oarchive.hpp
/usr/include/boost/archive/detail/iserializer.hpp
/usr/include/boost/archive/detail/oserializer.hpp
/usr/include/boost/archive/detail/polymorphic_iarchive_route.hpp
/usr/include/boost/archive/detail/polymorphic_oarchive_route.hpp
/usr/include/boost/archive/detail/register_archive.hpp
/usr/include/boost/archive/detail/utf8_codecvt_facet.hpp