Vercel Deployment Error: Command "npm run build" exited with 1

Question

I am developing a React app in VS Code. I used create-react-app for setup. I can run the project without any problem with npm start. When I tried to publish the project with Vercel I got errors:

Already tried deleting node_modules and npm install again.

Error! Command "npm run build" exited with 1
Error! Check your logs at https://...

You can see the logs below:

13:55:05.231    Retrieving list of deployment files...
13:55:06.975    Downloading 32 deployment files...
13:55:09.142    Analyzing source code...
13:55:11.289    Installing build runtime...
13:55:15.911    Build runtime installed: 4622.485ms
13:55:20.151    Looking up build cache...
13:55:21.237    Build cache not found
13:55:22.615    Detected package.json
13:55:22.616    Installing dependencies...
13:55:58.492    > [email protected] postinstall /vercel/path0/node_modules/babel-runtime/node_modules/core-js
13:55:58.492    > node -e "try{require('./postinstall')}catch(e){}"
13:55:58.604    > [email protected] postinstall /vercel/path0/node_modules/core-js
13:55:58.604    > node -e "try{require('./postinstall')}catch(e){}"
13:55:58.683    > [email protected] postinstall /vercel/path0/node_modules/core-js-pure
13:55:58.683    > node -e "try{require('./postinstall')}catch(e){}"
13:55:58.801    > [email protected] postinstall /vercel/path0/node_modules/ejs
13:55:58.802    > node ./postinstall.js
13:56:01.182    npm WARN optional SKIPPING OPTIONAL DEPENDENCY: [email protected] (node_modules/webpack-dev-server/node_modules/fsevents):
13:56:01.182    npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for [email protected]: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})
13:56:01.191    npm WARN optional SKIPPING OPTIONAL DEPENDENCY: [email protected] (node_modules/watchpack-chokidar2/node_modules/fsevents):
13:56:01.191    npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for [email protected]: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})
13:56:01.202    npm WARN optional SKIPPING OPTIONAL DEPENDENCY: [email protected] (node_modules/fsevents):
13:56:01.202    npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for [email protected]: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})
13:56:01.210    added 1985 packages from 812 contributors in 37.99s
13:56:02.556    137 packages are looking for funding
13:56:02.556      run `npm fund` for details
13:56:02.831    Running "npm run build"
13:56:03.100    > [email protected] build /vercel/path0
13:56:03.100    > react-scripts build
13:56:04.846    Creating an optimized production build...
13:56:23.548    Treating warnings as errors because process.env.CI = true.
13:56:23.548    Most CI servers set it automatically.
13:56:23.548    Failed to compile.
13:56:23.549    src/components/Counter.js
13:56:23.549      Line 21:6:  React Hook useEffect has a missing dependency: 'props.timeEnds'. Either include it or remove the dependency array  react-hooks/exhaustive-deps
13:56:23.577    npm ERR! code ELIFECYCLE
13:56:23.578    npm ERR! errno 1
13:56:23.581    npm ERR! [email protected] build: `react-scripts build`
13:56:23.581    npm ERR! Exit status 1
13:56:23.583    npm ERR! 
13:56:23.583    npm ERR! Failed at the [email protected] build script.
13:56:23.583    npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
13:56:23.592    npm ERR! A complete log of this run can be found in:
13:56:23.592    npm ERR!     /vercel/.npm/_logs/2021-03-28T10_56_23_582Z-debug.log
13:56:23.606    Error: Command "npm run build" exited with 1

Answer 1

If you are getting this error:

1. Go to your project setting in vercel.com.
2. Go to General.
3. In the "Build & Development Settings", override the Build command and write CI='' npm run build.

This solved the error for me.

Answer 2

Set CI Environment Variable to false Using Vercel CLI

Go to your project directory and then open the terminal and type

$ vercel env add CI

Vercel CLI 24.0.0
? What’s the value of CLI? false
? Add CLI to which Environments (select multiple, press a)? Production, Preview, Development
?  Added Environment Variable CLI to Project <Project-name> [776ms]

Now, go to your Vercel app => Settings => Environment Variable Their your will see CLI key has a value set to false