Broken npm 8.5.5~ds1-1~bpo11+1

[Grégory Pakosz <gregory.pakosz+debian@gmail.com>]

Hello,

I installed npm from bullseye-backports with the following command line:
# apt install -t bullseye-backports npm

Then trying to use npm fails with:
$ npm --version
Error: Cannot find module 'http-proxy-agent'
Require stack:
- /usr/share/nodejs/npm/node_modules/make-fetch-happen/lib/agent.js
- /usr/share/nodejs/npm/node_modules/make-fetch-happen/lib/remote.js
- /usr/share/nodejs/npm/node_modules/make-fetch-happen/lib/cache/entry.js
- /usr/share/nodejs/npm/node_modules/make-fetch-happen/lib/cache/index.js
- /usr/share/nodejs/npm/node_modules/make-fetch-happen/lib/fetch.js
- /usr/share/nodejs/npm/node_modules/make-fetch-happen/lib/index.js
- /usr/share/nodejs/npm/node_modules/npm-registry-fetch/lib/index.js
- /usr/share/nodejs/pacote/lib/remote.js
- /usr/share/nodejs/pacote/lib/git.js
- /usr/share/nodejs/pacote/lib/fetcher.js
- /usr/share/nodejs/pacote/lib/index.js
- /usr/share/nodejs/npm/lib/utils/update-notifier.js
- /usr/share/nodejs/npm/lib/cli.js
- /usr/share/nodejs/npm/bin/npm-cli.js
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:815:15)
    at Function.Module._load (internal/modules/cjs/loader.js:667:27)
    at Module.require (internal/modules/cjs/loader.js:887:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.<anonymous>
(/usr/share/nodejs/npm/node_modules/make-fetch-happen/lib/agent.js:169:24)
    at Module._compile (internal/modules/cjs/loader.js:999:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10)
    at Module.load (internal/modules/cjs/loader.js:863:32)
    at Function.Module._load (internal/modules/cjs/loader.js:708:14)
    at Module.require (internal/modules/cjs/loader.js:887:19)

Gregory