Missing module in sandbox from codesandbox ci

[trevor-scheer]

We're trying to use CS:CI for a React component for the first time and running into an interesting error that maybe y'all can help with.

Here's the base sandbox which is working fine:
https://codesandbox.io/s/npm-embeddable-explorer-zotwkv

Here's a PR which uses that sandbox in its sandbox config:
apollographql/embeddable-explorer#31

The packages in that build can be installed and work in an npm project. However, the actual sandbox fork says the module is missing. When I look into the sources, I don't see @apollo/explorer anywhere in the node_modules like I'd expect. Here's a screenshot of what I'm looking at:

In the original sandbox, the @apollo/explorer module does show up in the node_modules.

Hopefully that's helpful, let me know if you need any more info from us.

[CompuIves]

Heya! I think I found the problem here. Upon checking the package (by downloading https://pkg.csb.dev/apollographql/embeddable-explorer/commit/1c097f19/@apollo/explorer and renaming it to package.tgz) I see that the package.json refers this:

"module": "dist/embeddable-explorer.esm.js",

But when looking in the dist folder, I don't see it:

I think that this is giving the holdup, but we should have a better error message for this. I also don't know why we don't get this error when loading the sandbox, it could be because we're resolving a bit differently, but that's something we need to double check.

[trevor-scheer]

Thanks Ives, good find! We'll take a look and report back, hopefully I can just close out the issue (unless you'd like it left open as an action item for error messaging?). cc @mayakoneval

[mayakoneval]

Can confirm this was the issue, thank you! Happy to close 🙏