/usr/include/boost/proto/transform/detail/ is in libboost1.55-dev 1.55.0+dfsg-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/boost/proto/transform/detail/call.hpp
/usr/include/boost/proto/transform/detail/construct_funop.hpp
/usr/include/boost/proto/transform/detail/construct_pod_funop.hpp
/usr/include/boost/proto/transform/detail/default_function_impl.hpp
/usr/include/boost/proto/transform/detail/expand_pack.hpp
/usr/include/boost/proto/transform/detail/fold_impl.hpp
/usr/include/boost/proto/transform/detail/lazy.hpp
/usr/include/boost/proto/transform/detail/make.hpp
/usr/include/boost/proto/transform/detail/make_gcc_workaround.hpp
/usr/include/boost/proto/transform/detail/pack.hpp
/usr/include/boost/proto/transform/detail/pack_impl.hpp
/usr/include/boost/proto/transform/detail/pass_through_impl.hpp
/usr/include/boost/proto/transform/detail/preprocessed/
/usr/include/boost/proto/transform/detail/preprocessed/call.hpp
/usr/include/boost/proto/transform/detail/preprocessed/construct_funop.hpp
/usr/include/boost/proto/transform/detail/preprocessed/construct_pod_funop.hpp
/usr/include/boost/proto/transform/detail/preprocessed/default_function_impl.hpp
/usr/include/boost/proto/transform/detail/preprocessed/expand_pack.hpp
/usr/include/boost/proto/transform/detail/preprocessed/fold_impl.hpp
/usr/include/boost/proto/transform/detail/preprocessed/lazy.hpp
/usr/include/boost/proto/transform/detail/preprocessed/make.hpp
/usr/include/boost/proto/transform/detail/preprocessed/make_gcc_workaround.hpp
/usr/include/boost/proto/transform/detail/preprocessed/pack_impl.hpp
/usr/include/boost/proto/transform/detail/preprocessed/pass_through_impl.hpp
/usr/include/boost/proto/transform/detail/preprocessed/when.hpp
/usr/include/boost/proto/transform/detail/when.hpp