astro add fails when in a npm workspace

[rverton]

What version of astro are you using?

2.9.6

Are you using an SSR adapter? If so, which one?

None

What package manager are you using?

npm

What operating system are you using?

Mac

What browser are you using?

Chrome

Describe the Bug

When I use Astro in a npm workspace, adding integrations via astro add fails.

1. npm init
2. npm init -w ./packages/web
3. rm ./packages/web/package.json (so create-astro can run in an empty folder)
4. cd ./packages/web/ && npx create-astro@latest and confirm each question
5. npm run astro add tailwind

This results in:

✔ Continue? … yes
✖ Installing dependencies...
 error   Astro could not update your astro.config.js file safely.
  Reason: Unable to install dependencies

  You will need to add these integration(s) manually.
  Documentation: https://docs.astro.build/en/guides/integrations-guide/
  File:
    /private/tmp/astro-workspaces/node_modules/astro/dist/cli/add/index.js:170:31
  Code:
    169 |     case 3 /* failure */: {
    > 170 |       throw createPrettyError(new Error(`Unable to install dependencies`));
          |                               ^
      171 |     }
      172 |   }
      173 |   const rawConfigPath = await resolveConfigPath({ cwd, flags, fs: fsMod });
  Stacktrace:
Error: Astro could not update your astro.config.js file safely.
Reason: Unable to install dependencies

You will need to add these integration(s) manually.
Documentation: https://docs.astro.build/en/guides/integrations-guide/
    at add (file:///private/tmp/astro-workspaces/node_modules/astro/dist/cli/add/index.js:170:31)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at async runCommand (file:///private/tmp/astro-workspaces/node_modules/astro/dist/cli/index.js:103:7)
    at async cli (file:///private/tmp/astro-workspaces/node_modules/astro/dist/cli/index.js:155:5)

This may be related to #3071.

What's the expected result?

The integration is added without any error.

Link to Minimal Reproducible Example

Participation

• I am willing to submit a pull request for this issue.

[justindra]

Just adding some more info here as just ran into this issue when using the pnpm astro add tailwind command.

What version of astro are you using?
2.10.6

Are you using an SSR adapter? If so, which one?
None

What package manager are you using?
pnpm

What operating system are you using?
Ubuntu (WSL2 on Windows)

What browser are you using?
Chrome

[rishi-raj-jain]

Related #8487

[bluwy]

The core issue is an upstream issue at zkochan/packages#180 and I made a fix at zkochan/packages#183. However the CLI didn't quite reported the issue nicely so I'll make a fix to surface that better as the solution for now. When the upstream PR is merged, this should also be fixed automatically.