Next.js Deployment Fails on Vercel: 'npm run build' Exiting with Code 1

Other Questions NPM
1

Next.js build fails on Vercel: “npm run build exited with 1”. Locally it works. I cleared caches and disabled linting. Sample config:

{
  "scripts": {
    "build": "prepare && run-build"
  }
}

Any suggestions?

2

hey hazel, i had a simmilar problem with custom scrpts. try runnin next build directly and double-check if your prepare step works properly on vercel. sometimes env vars help too.

3

hey hazel, i had a similar issue and fixed it by ensuring my node modules were in sync. double-checking the lockfile and vercel’s node version helped me. might be worth re-installing deps on vercel to catch any subtle mismatches

4

In my experience, these kinds of build errors are often related to discrepancies between local and production environments, particularly around custom scripts like your prepare step. I encountered a similar issue where a minor difference in how scripts were executed on Vercel compared to my local setup led to unexpected failures. It helped to carefully review the output logs for any subtle hints that something wasn’t running as expected. Verifying that all necessary environment variables are set correctly in production also made a significant difference in my case. It might also be worthwhile to try a direct build command to isolate the issue.

5

The issue you’re encountering appears to be related to subtle differences between the local and production environments. I recently had a similar problem where the custom prepare script was not executing correctly on Vercel because of a slight discrepancy in the node version between my local machine and the deployment environment. What helped in my case was to ensure that the node version specified in the project matched Vercel’s configuration and to add extra logging to the prepare step so that any errors would be easier to diagnose during the build process. A careful review of environment-specific behavior even in minor scripts is often the key.

6

Although the issue seems to be rooted in environment discrepancies, I encountered a similar problem where the prepare phase was silently failing on Vercel. In my case, it was due to an unnoticed incompatibility between my local and production configurations, especially in the custom scripts. I resolved it by adding detailed logging to the prepare script and verifying that my dependency versions were consistent in both environments. It is also helpful to run the build command directly in Vercel’s console to pinpoint which part of the process is failing. A thorough review of your configuration can often uncover these subtle mismatches.