/usr/include/thrust/system/cpp/detail/ is in libthrust-dev 1.7.0-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/thrust/system/cpp/detail/adjacent_difference.h
/usr/include/thrust/system/cpp/detail/assign_value.h
/usr/include/thrust/system/cpp/detail/binary_search.h
/usr/include/thrust/system/cpp/detail/copy.h
/usr/include/thrust/system/cpp/detail/copy_if.h
/usr/include/thrust/system/cpp/detail/count.h
/usr/include/thrust/system/cpp/detail/dispatch/
/usr/include/thrust/system/cpp/detail/dispatch/sort.h
/usr/include/thrust/system/cpp/detail/equal.h
/usr/include/thrust/system/cpp/detail/execution_policy.h
/usr/include/thrust/system/cpp/detail/extrema.h
/usr/include/thrust/system/cpp/detail/fill.h
/usr/include/thrust/system/cpp/detail/find.h
/usr/include/thrust/system/cpp/detail/for_each.h
/usr/include/thrust/system/cpp/detail/gather.h
/usr/include/thrust/system/cpp/detail/generate.h
/usr/include/thrust/system/cpp/detail/get_value.h
/usr/include/thrust/system/cpp/detail/inner_product.h
/usr/include/thrust/system/cpp/detail/iter_swap.h
/usr/include/thrust/system/cpp/detail/logical.h
/usr/include/thrust/system/cpp/detail/malloc_and_free.h
/usr/include/thrust/system/cpp/detail/memory.inl
/usr/include/thrust/system/cpp/detail/merge.h
/usr/include/thrust/system/cpp/detail/mismatch.h
/usr/include/thrust/system/cpp/detail/par.h
/usr/include/thrust/system/cpp/detail/partition.h
/usr/include/thrust/system/cpp/detail/reduce.h
/usr/include/thrust/system/cpp/detail/reduce_by_key.h
/usr/include/thrust/system/cpp/detail/remove.h
/usr/include/thrust/system/cpp/detail/replace.h
/usr/include/thrust/system/cpp/detail/reverse.h
/usr/include/thrust/system/cpp/detail/scan.h
/usr/include/thrust/system/cpp/detail/scan_by_key.h
/usr/include/thrust/system/cpp/detail/scatter.h
/usr/include/thrust/system/cpp/detail/sequence.h
/usr/include/thrust/system/cpp/detail/set_operations.h
/usr/include/thrust/system/cpp/detail/sort.h
/usr/include/thrust/system/cpp/detail/swap_ranges.h
/usr/include/thrust/system/cpp/detail/tabulate.h
/usr/include/thrust/system/cpp/detail/temporary_buffer.h
/usr/include/thrust/system/cpp/detail/transform.h
/usr/include/thrust/system/cpp/detail/transform_reduce.h
/usr/include/thrust/system/cpp/detail/transform_scan.h
/usr/include/thrust/system/cpp/detail/uninitialized_copy.h
/usr/include/thrust/system/cpp/detail/uninitialized_fill.h
/usr/include/thrust/system/cpp/detail/unique.h
/usr/include/thrust/system/cpp/detail/unique_by_key.h
/usr/include/thrust/system/cpp/detail/vector.inl