title: How do I solve npm run build command not found error?
body: <p>I have this in my script</p>
  <pre><code>&quot;scripts&quot;: {
      &quot;start&quot;: &quot;webpack&quot;,
      &quot;compile&quot;: &quot;tsc -p tsconfig.sequences.json&quot;,
      &quot;build&quot;: &quot;npm-run-all -p compile start&quot;,
  </code></pre>
  <p>But getting this error message</p>
  <pre><code>sh: npm-run-all: command not found
  npm ERR! code ELIFECYCLE
  npm ERR! syscall spawn
  npm ERR! file sh
  npm ERR! errno ENOENT
  npm ERR! workshop4@1.0.0 build: `npm-run-all -p compile start`
  npm ERR! spawn ENOENT
  npm ERR! 
  npm ERR! Failed at the workshop4@1.0.0 build script.
  npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
  </code></pre>
  <p>I have version 6.13.4 npm and node 12.14</p>