Import "server side module" in page problem

[ErnestBrandi]

Describe the bug

I feel like I miss something, but when I import a custom script (which itself import the node-persist module as follow import storage from 'node-persist';) I have the following bug

error - ./node_modules/node-persist/src/local-storage.js:6:0
Module not found: Can't resolve 'fs'
null

I do this import (the custom script) in order to use an async function in getServerSideProps.

To Reproduce

Just import node-persist in a page.

Expected behavior

Should be able to import a custom script importing "server side" modules itself (I say server side because it handles files).

System information

Everything is to the latest version.
"next": "9.5.2",
"node-persist": "^3.1.0",

[ErnestBrandi]

Found what was going wrong. Just make sure you call everything (functions, etc) coming from that import into the getServerSideProps function so Next.js knows it is to be bundled server side (and excluded client side).