/usr/include/boost/phoenix/scope/detail/ is in libboost1.54-dev 1.54.0-4ubuntu3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/boost/phoenix/scope/detail/dynamic.hpp
/usr/include/boost/phoenix/scope/detail/local_gen.hpp
/usr/include/boost/phoenix/scope/detail/local_variable.hpp
/usr/include/boost/phoenix/scope/detail/make_locals.hpp
/usr/include/boost/phoenix/scope/detail/preprocessed/
/usr/include/boost/phoenix/scope/detail/preprocessed/dynamic.hpp
/usr/include/boost/phoenix/scope/detail/preprocessed/dynamic_10.hpp
/usr/include/boost/phoenix/scope/detail/preprocessed/dynamic_20.hpp
/usr/include/boost/phoenix/scope/detail/preprocessed/dynamic_30.hpp
/usr/include/boost/phoenix/scope/detail/preprocessed/dynamic_40.hpp
/usr/include/boost/phoenix/scope/detail/preprocessed/dynamic_50.hpp
/usr/include/boost/phoenix/scope/detail/preprocessed/make_locals.hpp
/usr/include/boost/phoenix/scope/detail/preprocessed/make_locals_10.hpp
/usr/include/boost/phoenix/scope/detail/preprocessed/make_locals_20.hpp
/usr/include/boost/phoenix/scope/detail/preprocessed/make_locals_30.hpp
/usr/include/boost/phoenix/scope/detail/preprocessed/make_locals_40.hpp
/usr/include/boost/phoenix/scope/detail/preprocessed/make_locals_50.hpp