How not to build a typescript module before importing it into a monorepository?

Question

Web development

Greetings!

There is a test monorepository .

The backend package in packages/backend/main.js tries to import a function from packages/common.
The problem is that an error occurs: The SyntaxError: Unexpected token 'export'

error can be avoided by changing package.json -> main: "./dist/index.js" in the common package and building the common package itself.
Question for connoisseurs: how to achieve not building the common package before importing its modules with other packages?

Thanks in advance!