/usr/include/boost/hana/detail/ is in libboost1.65-dev 1.65.1+dfsg-0ubuntu5.
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..
/usr/include/boost/hana/detail/algorithm.hpp
/usr/include/boost/hana/detail/any_of.hpp
/usr/include/boost/hana/detail/array.hpp
/usr/include/boost/hana/detail/canonical_constant.hpp
/usr/include/boost/hana/detail/concepts.hpp
/usr/include/boost/hana/detail/create.hpp
/usr/include/boost/hana/detail/decay.hpp
/usr/include/boost/hana/detail/dispatch_if.hpp
/usr/include/boost/hana/detail/ebo.hpp
/usr/include/boost/hana/detail/fast_and.hpp
/usr/include/boost/hana/detail/first_unsatisfied_index.hpp
/usr/include/boost/hana/detail/has_common_embedding.hpp
/usr/include/boost/hana/detail/has_duplicates.hpp
/usr/include/boost/hana/detail/hash_table.hpp
/usr/include/boost/hana/detail/index_if.hpp
/usr/include/boost/hana/detail/integral_constant.hpp
/usr/include/boost/hana/detail/intrinsics.hpp
/usr/include/boost/hana/detail/nested_by.hpp
/usr/include/boost/hana/detail/nested_by_fwd.hpp
/usr/include/boost/hana/detail/nested_than.hpp
/usr/include/boost/hana/detail/nested_than_fwd.hpp
/usr/include/boost/hana/detail/nested_to.hpp
/usr/include/boost/hana/detail/nested_to_fwd.hpp
/usr/include/boost/hana/detail/operators/
/usr/include/boost/hana/detail/operators/adl.hpp
/usr/include/boost/hana/detail/operators/arithmetic.hpp
/usr/include/boost/hana/detail/operators/comparable.hpp
/usr/include/boost/hana/detail/operators/iterable.hpp
/usr/include/boost/hana/detail/operators/logical.hpp
/usr/include/boost/hana/detail/operators/monad.hpp
/usr/include/boost/hana/detail/operators/orderable.hpp
/usr/include/boost/hana/detail/operators/searchable.hpp
/usr/include/boost/hana/detail/preprocessor.hpp
/usr/include/boost/hana/detail/std_common_type.hpp
/usr/include/boost/hana/detail/struct_macros.hpp
/usr/include/boost/hana/detail/type_at.hpp
/usr/include/boost/hana/detail/type_foldl1.hpp
/usr/include/boost/hana/detail/type_foldr1.hpp
/usr/include/boost/hana/detail/unpack_flatten.hpp
/usr/include/boost/hana/detail/variadic/
/usr/include/boost/hana/detail/variadic/at.hpp
/usr/include/boost/hana/detail/variadic/drop_into.hpp
/usr/include/boost/hana/detail/variadic/foldl1.hpp
/usr/include/boost/hana/detail/variadic/foldr1.hpp
/usr/include/boost/hana/detail/variadic/reverse_apply/
/usr/include/boost/hana/detail/variadic/reverse_apply.hpp
/usr/include/boost/hana/detail/variadic/reverse_apply/flat.hpp
/usr/include/boost/hana/detail/variadic/reverse_apply/unrolled.hpp
/usr/include/boost/hana/detail/variadic/split_at.hpp
/usr/include/boost/hana/detail/variadic/take.hpp
/usr/include/boost/hana/detail/void_t.hpp
/usr/include/boost/hana/detail/wrong.hpp