/usr/include/boost/concept/ is in libboost1.62-dev 1.62.0+dfsg-5.
This file is owned by root:root, with mode 0o755.
..
/usr/include/boost/concept/assert.hpp
/usr/include/boost/concept/detail/
/usr/include/boost/concept/detail/backward_compatibility.hpp
/usr/include/boost/concept/detail/borland.hpp
/usr/include/boost/concept/detail/concept_def.hpp
/usr/include/boost/concept/detail/concept_undef.hpp
/usr/include/boost/concept/detail/general.hpp
/usr/include/boost/concept/detail/has_constraints.hpp
/usr/include/boost/concept/detail/msvc.hpp
/usr/include/boost/concept/requires.hpp
/usr/include/boost/concept/usage.hpp
/usr/include/boost/concept_check/borland.hpp
/usr/include/boost/concept_check/general.hpp
/usr/include/boost/concept_check/has_constraints.hpp
/usr/include/boost/concept_check/msvc.hpp