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looks like you’re using code that’s not been transpiled

`import` isn’t valid in node unless the file is an `.mjs` file and you’re in node 13 or newer

It’s simply one Typescript file (our own, private module). Yes, the file transpiled to Javascript is `.gitignore` d, i.e. not in the Github repo. That could explain why it works locally.

You know what the best-practice is?

it might still be included in the published package even if it’s ignored :slightly_smiling_face:

you can’t import a typescript module unless you transpile things inside node_modules, and that usually makes your build extremely slow

so you want to transpile the module when you publish it and change your package.json `"main"`  field to point to the transpiled code

I see. The first (transpiling on each build) would require this in `package.json` , or?
```    "scripts": {
        "build": "tsc"
    },```
(taken from <https://github.com/pulumi/pulumi-gcp/blob/master/sdk/nodejs/package.json#L12-L14>)

The other way would be to push also the transpiled JS file to the Github repo.

Hmm, the
```"scripts": {
    "build": "tsc",
    "prepare": "npm run build"
  },```
doesn’t work, either.
(The `prepare` part is from <https://www.reddit.com/r/typescript/comments/9ctsbd/how_do_i_publish_a_typescript_library_to_a/e5db0e4/>)

how do you reference the dependency? is it published on an internal npm server? or are you working with a monorepo type deal?

<@UQ23ERNT1> No worries. Thanks for your help so far.

I want to avoid to use a (private) NPM server (no matter the official or an internal server). I.e. to reference the dependency via `git+https://`.

Seems like pushing the transpiled JavaScript code is the way to go, as you mentioned. Others take the same approach:
<https://stackoverflow.com/questions/55002806/how-to-publish-a-private-typescript-npm-package-in-git/55004794#55004794>