/usr/include/boost/compute/detail/ is in libboost1.65-dev 1.65.1+dfsg-0ubuntu5.
This file is owned by root:root, with mode 0o755.
..
/usr/include/boost/compute/detail/assert_cl_success.hpp
/usr/include/boost/compute/detail/buffer_value.hpp
/usr/include/boost/compute/detail/device_ptr.hpp
/usr/include/boost/compute/detail/diagnostic.hpp
/usr/include/boost/compute/detail/duration.hpp
/usr/include/boost/compute/detail/get_object_info.hpp
/usr/include/boost/compute/detail/getenv.hpp
/usr/include/boost/compute/detail/global_static.hpp
/usr/include/boost/compute/detail/is_buffer_iterator.hpp
/usr/include/boost/compute/detail/is_contiguous_iterator.hpp
/usr/include/boost/compute/detail/iterator_plus_distance.hpp
/usr/include/boost/compute/detail/iterator_range_size.hpp
/usr/include/boost/compute/detail/iterator_traits.hpp
/usr/include/boost/compute/detail/literal.hpp
/usr/include/boost/compute/detail/lru_cache.hpp
/usr/include/boost/compute/detail/meta_kernel.hpp
/usr/include/boost/compute/detail/mpl_vector_to_tuple.hpp
/usr/include/boost/compute/detail/nvidia_compute_capability.hpp
/usr/include/boost/compute/detail/parameter_cache.hpp
/usr/include/boost/compute/detail/path.hpp
/usr/include/boost/compute/detail/print_range.hpp
/usr/include/boost/compute/detail/read_write_single_value.hpp
/usr/include/boost/compute/detail/sha1.hpp
/usr/include/boost/compute/detail/variadic_macros.hpp
/usr/include/boost/compute/detail/vendor.hpp
/usr/include/boost/compute/detail/work_size.hpp