/usr/include/thrust/system/cpp/detail/ is in libthrust-dev 1.6.0-1.
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/algorithm.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/dispatch/
/usr/include/thrust/system/cpp/detail/dispatch/sort.h
/usr/include/thrust/system/cpp/detail/extrema.h
/usr/include/thrust/system/cpp/detail/find.h
/usr/include/thrust/system/cpp/detail/for_each.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/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/scan.h
/usr/include/thrust/system/cpp/detail/scan_by_key.h
/usr/include/thrust/system/cpp/detail/set_operations.h
/usr/include/thrust/system/cpp/detail/sort.h
/usr/include/thrust/system/cpp/detail/tag.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