How to do code sharing in NestJS through Yarn Workspaces

I'm trying to do a proof of concept for a simple monorepo application. I decided to just use Yarn Workspaces (I think Lerna maybe here is overkill) to set up my package architecture.

I have a shared package that I'm using to share code with the frontend and the backend. I successfully achieved to make it works for the frontend (As I'm using NextJS in the frontend there was already a NPM library named next-transpile-module to get everything running up smoothly) but now, I'm stuck at the backend, and I'm not sure if it's even possible because I couldn't find information on Google.

Here's the error that it's throwing up when I try to start the API:

/Users/Alfonso/git/taurus/packages/shared/dist/index.js:1
export var PRODUCT_NAME = "ACME";
^^^^^^

SyntaxError: Unexpected token 'export'
    at wrapSafe (internal/modules/cjs/loader.js:1054:16)
    at Module._compile (internal/modules/cjs/loader.js:1102:27)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1158:10)
    at Module.load (internal/modules/cjs/loader.js:986:32)
    at Function.Module._load (internal/modules/cjs/loader.js:879:14)
    at Module.require (internal/modules/cjs/loader.js:1026:19)
    at require (internal/modules/cjs/helpers.js:72:18)
    at Object.<anonymous> (/Users/Alfonso/git/taurus/packages/api/dist/app.service.js:11:18)
    at Module._compile (internal/modules/cjs/loader.js:1138:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1158:10)

It's exactly the same error (Unexpected token 'export') that I was getting in the client package, but as I mentioned, that NPM lib named next-transpile-module fixed it.. so it should be something related to transpilation but I have no idea! :)