npm package for v1.17 failed to build

Nobody has claimed this yet.

https://github.com/matrix-org/matrix-spec/actions/runs/20343739562/job/58450129683

```
Run npm install -g npm@latest
npm error code EACCES
npm error syscall mkdir
npm error path /usr/local/share/man/man7
npm error errno -13
npm error Error: EACCES: permission denied, mkdir '/usr/local/share/man/man7'
npm error at async mkdir (node:internal/fs/promises:858:10)
npm error at async Promise.all (index 0)
npm error at async Promise.all (index 1)
npm error at async #createBinLinks (/usr/local/lib/node_modules/npm/node_modules/@npmcli/arborist/lib/arborist/rebuild.js:394:5)
npm error at async Promise.allSettled (index 0)
npm error at async #linkAllBins (/usr/local/lib/node_modules/npm/node_modules/@npmcli/arborist/lib/arborist/rebuild.js:375:5)
npm error at async #build (/usr/local/lib/node_modules/npm/node_modules/@npmcli/arborist/lib/arborist/rebuild.js:160:7)
npm error at async Arborist.rebuild (/usr/local/lib/node_modules/npm/node_modules/@npmcli/arborist/lib/arborist/rebuild.js:62:5)
npm error at async [reifyPackages] (/usr/local/lib/node_modules/npm/node_modules/@npmcli/arborist/lib/arborist/reify.js:325:11)
npm error at async Arborist.reify (/usr/local/lib/node_modules/npm/node_modules/@npmcli/arborist/lib/arborist/reify.js:142:5) {
npm error errno: -13,
npm error code: 'EACCES',
npm error syscall: 'mkdir',
npm error path: '/usr/local/share/man/man7'
npm error }
npm error
npm error The operation was rejected by your operating system.
npm error It is likely you do not have the permissions to access this file as the current user
npm error
npm error If you believe this might be a permissions issue, please double-check the
npm error permissions of the file and its containing directories, or try running
npm error the command again as root/Administrator.
npm error A complete log of this run can be found in: /home/runner/.npm/_logs/2025-12-18T16_24_53_745Z-debug-0.log
Error: Process completed with exit code 243.
```

Start with the linked GitHub Actions run and locate the workflow step executing `npm install -g npm@latest`; inspect the package build configuration around that step. Re-run the v1.17 package build after addressing the reported permission failure, and confirm that the workflow completes successfully.

Written by the indexing model from the issue text.