[BUG] peerDependency not installed (workspaces)

[kirrg001]

Is there an existing issue for this?

• I have searched the existing issues

This issue exists in the latest npm version

• I am using the latest npm

Current Behavior

Refs #2600

I am using NPM workspaces.
I moved all my dev dependencies to the root package.json (because I was running into #4056)

devDependencies: {
   ...
   "mssql": "^7.1.0",
   "knex": "^0.21.21",
   ....
}

[email protected] has a peerDependency to mssql@6 (see)

I am getting an error when running npm install

npm ERR! code ERESOLVE
npm ERR! ERESOLVE could not resolve
npm ERR!
npm ERR! While resolving: @projectname/root@undefined
npm ERR! Found: [email protected]
npm ERR! node_modules/mssql
npm ERR!   dev mssql@"^7.1.0" from the root project
npm ERR!   peerOptional mssql@"*" from [email protected]
npm ERR!   node_modules/typeorm
npm ERR!     dev typeorm@"^0.2.37" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! dev knex@"^0.21.21" from the root project
npm ERR!
npm ERR! Conflicting peer dependency: [email protected]
npm ERR! node_modules/mssql
npm ERR!   peerOptional mssql@"^6.2.1" from [email protected]
npm ERR!   node_modules/knex
npm ERR!     dev knex@"^0.21.21" from the root project

I tried --legacy--peer-deps, but this is not what I want. This flag will just ignore the peer dependency. Knex will then use mssql@7!

Expected Behavior

I expected that npm provides a way to install both versions.

node_modules
    mssql@7
    knex
        node_modules
            mssql@6

Steps To Reproduce

See above.

Environment

• npm: 8.1.4
• Node: v16.13.0
• OS: Monterey
• platform: OSX

[ghost]

Facing similar issue. We are using knex and objection. In our case, some of the direct dependencies are not installed as well in workspaces. Works fine when these packages are installed in the root.

[ghost]

Facing similar issue. We are using knex and objection. In our case, some of the direct dependencies are not installed as well in workspaces. Works fine when these packages are installed in the root.

this happens if node_modules directories are in the workspace directories. a fresh installation without lockfile and node_modules directory. the issue doesn't happen.

[oswaldoacauan]

We still see the same issue when having different Next and React versions in two different workspaces.

Same deal as mentioned above. If we run the npm install inside the workspace folder it works as expected.

[easa]

I guess it's not a bug yet there is no instruction about how to handle this conflicts. I couldn't find anything in the docs and I would be grateful if you could explain what this error means in workspaces and what we need to do to fix it.

[danielritter]

same problem here