How to import library into library on forc v0.37.0?

Hi guys
We noticed library declarations were updated on forc v0.37.0 and I have a question
src folder contains 3 files: a contract main.sw and 2 libraries: structs.sw and i64.sw.
We need to use i64.sw inside main.sw and inside structs.sw

main.sw

contract;

mod structs;
mod i64;


use i64::I64;
use structs::*;

...

i64.sw

library;
...

structs.sw

library;

mod i64;
use i64::I64;

But when I’m trying to compile I have an error

Please help manage the libraries

I believe you have to move the i64 to an external library in order to use it like this. You can find the instructions for how to set this up in the Sway book here: Libraries - The Sway Programming Language