twurple | Interact with Twitch 's API , chat and subscribe to events | Chat library

Somewhere along the lines of updating my node version / dependencies for both machines, I noticed that building my app in production on another machine outputs an error while building for production on my main machine does not.

The errors go away if I move the affected devDependencies to the dependencies array in my package.json, but that's more of a workaround and I would like to know why I'm seeing the different behavior.

As far as I understand, when running npm install in production, it will not install my dev dependencies. This is fine since I tested this on my dev machine, and the app built fine even without my dev dependencies.

However, in production, I get errors such as these:

Cannot find module 'sinon' or its corresponding type declarations.

Could not find a declaration file for module 'cors'. '/home/ubuntu/brobot/source/node_modules/cors/lib/index.js' implicitly has an 'any' type. Try `npm i --save-dev @types/cors` if it exists or add a new declaration (.d.ts) file containing `declare module 'cors';

They go away if I move the affected packages to the dependencies array instead of dev dependencies, but why? And why does it build fine without my dev dependencies on my dev machine?

Here are my configurations:

package.json shortened: