lerna: not found

I opened this repo on GitPod (I noticed it has a .gitpod.yml file) and tried to build the single/script example from the browser package. It failed with lerna: not found. Is it trying to run lerna from bash instead of from npx?

HISTFILE=/workspace/.gitpod/cmd-0 history -r; {
npm install && npm run build
}
gitpod /workspace/solid-client-authn-js (main) $  HISTFILE=/workspace/.gitpod/cmd-0 history -r; {
> npm install && npm run build
> }
npm warn deprecated @humanwhocodes/config-array@0.13.0: Use @eslint/config-array instead
npm warn deprecated @humanwhocodes/object-schema@2.0.3: Use @eslint/object-schema instead

> root@0.0.0 postinstall
> npm run build


> root@0.0.0 build
> lerna run build

(node:2231) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
(Use `node --trace-deprecation ...` to show where the warning was created)
lerna notice cli v8.1.9

   ✔  @inrupt/solid-client-authn-core:build (4s)
   ✔  @inrupt/oidc-client-ext:build (4s)
   ✔  @inrupt/solid-client-authn-node:build (4s)
   ✔  @inrupt/solid-client-authn-browser:build (10s)
   ✔  browser-in-bundle:build (9s)
   ✔  test-app:build (29s)

————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————

 Lerna (powered by Nx)   Successfully ran target build for 6 projects (47s)


added 1878 packages, and audited 1905 packages in 2m

276 packages are looking for funding
  run `npm fund` for details

found 0 vulnerabilities
npm notice
npm notice New major version of npm available! 10.9.0 -> 11.0.0
npm notice Changelog: https://github.com/npm/cli/releases/tag/v11.0.0
npm notice To update run: npm install -g npm@11.0.0
npm notice

> root@0.0.0 build
> lerna run build

(node:3233) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
(Use `node --trace-deprecation ...` to show where the warning was created)
lerna notice cli v8.1.9

   ✔  @inrupt/solid-client-authn-core:build (6s)
   ✔  @inrupt/oidc-client-ext:build (4s)
   ✔  @inrupt/solid-client-authn-node:build (4s)
   ✔  @inrupt/solid-client-authn-browser:build (12s)
   ✔  browser-in-bundle:build (11s)
   ✔  test-app:build (24s)

————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————

 Lerna (powered by Nx)   Successfully ran target build for 6 projects (45s)

gitpod /workspace/solid-client-authn-js (main) $ cd packages/browser/examples/single/script/
gitpod /workspace/solid-client-authn-js/packages/browser/examples/single/script (main) $ npm ci

> root@0.0.0 postinstall
> npm run build


> root@0.0.0 build
> lerna run build

sh: 1: lerna: not found
npm error code 127
npm error path /workspace/solid-client-authn-js
npm error command failed
npm error command sh -c npm run build
npm error A complete log of this run can be found in: /home/gitpod/.npm/_logs/2025-01-13T09_48_05_413Z-debug-0.log

I also tried to run npm ci in the repo root as the docs of the example say but still got the same error.

$ history
    1  npm install && npm run build
    2  cd packages/browser/examples/single/script/
    3  npm ci
    4  cd 
    5  cd /workspace/solid-client-authn-js/
    6  npm ci
    7  cd /workspace/solid-client-authn-js/
    8  npm ci
    9  cd packages/browser/examples/single/script/
   10  npm ci
   11  history

The failure occurs in the root build script (lerna run build) reached by npm install or npm ci; the example is under packages/browser/examples/single/script/, with setup guidance in its docs and environment details in .gitpod.yml. Reproduce the setup from the repository root and the example directory, then verify it completes without lerna: not found.