Yep, though you're likely to find that nimsuggest chokes on large projects, so a lot of people end up turning it off in their editors eventually, once the pain outweighs the gain. :(
Hopefully this will be fixed this year (if I understand correctly, nimsuggest improvements are on the roadmap, but is dependent on incremental compilation being shipped first - or maybe a new approach will be explored that doesn't rely on the compiler at all)