[bug]: EUNSUPPORTEDPROTOCOL while trying to create monorepo

[iChintanSoni]

Describe the bug

While creating a new monorepo project, it throws below error:

chintansoni@192 projects % npx shadcn@canary init
✔ The path /Users/chintansoni/projects does not contain a package.json file.
  Would you like to start a new project? › Next.js (Monorepo)
✔ What is your project named? … shadcn-monorepo
✖ Something went wrong creating a new Next.js monorepo.
Something went wrong. Please check the error below for more details.
If the problem persists, please open an issue on GitHub.

Command failed with exit code 1: npm install
npm error code EUNSUPPORTEDPROTOCOL
npm error Unsupported URL Type "workspace:": workspace:*
npm error A complete log of this run can be found in: /Users/chintansoni/.npm/_logs/2024-12-28T06_33_50_510Z-debug-0.log

Affected component/components

Project creation

How to reproduce

1. Go to the terminal
2. Execute: npx shadcn@canary init
3. In the first prompt Would you like to start a new project?, select Next.js (Monorepo)
4. In the next prompt What is your project named?, enter the project name shadcn-monorepo

Codesandbox/StackBlitz link

No response

Logs

0 verbose cli /Users/chintansoni/.nvm/versions/node/v22.8.0/bin/node /Users/chintansoni/.nvm/versions/node/v22.8.0/bin/npm
1 info using [email protected]
2 info using [email protected]
3 silly config load:file:/Users/chintansoni/.nvm/versions/node/v22.8.0/lib/node_modules/npm/npmrc
4 silly config load:file:/Users/chintansoni/projects/shadcn-monorepo/.npmrc
5 silly config load:file:/Users/chintansoni/.npmrc
6 silly config load:file:/Users/chintansoni/.nvm/versions/node/v22.8.0/etc/npmrc
7 verbose title npm install
8 verbose argv "install"
9 verbose logfile logs-max:10 dir:/Users/chintansoni/.npm/_logs/2024-12-28T06_33_50_510Z-
10 verbose logfile /Users/chintansoni/.npm/_logs/2024-12-28T06_33_50_510Z-debug-0.log
11 silly logfile start cleaning logs, removing 1 files
12 silly packumentCache heap:2197815296 maxSize:549453824 maxEntrySize:274726912
13 silly logfile done cleaning log files
14 silly idealTree buildDeps
15 verbose stack Error: Unsupported URL Type "workspace:": workspace:*
15 verbose stack     at unsupportedURLType (/Users/chintansoni/.nvm/versions/node/v22.8.0/lib/node_modules/npm/node_modules/npm-package-arg/lib/npa.js:310:15)
15 verbose stack     at fromURL (/Users/chintansoni/.nvm/versions/node/v22.8.0/lib/node_modules/npm/node_modules/npm-package-arg/lib/npa.js:367:13)
15 verbose stack     at Function.resolve (/Users/chintansoni/.nvm/versions/node/v22.8.0/lib/node_modules/npm/node_modules/npm-package-arg/lib/npa.js:83:12)
15 verbose stack     at #nodeFromEdge (/Users/chintansoni/.nvm/versions/node/v22.8.0/lib/node_modules/npm/node_modules/@npmcli/arborist/lib/arborist/build-ideal-tree.js:1039:22)
15 verbose stack     at #buildDepStep (/Users/chintansoni/.nvm/versions/node/v22.8.0/lib/node_modules/npm/node_modules/@npmcli/arborist/lib/arborist/build-ideal-tree.js:904:35)
15 verbose stack     at #buildDeps (/Users/chintansoni/.nvm/versions/node/v22.8.0/lib/node_modules/npm/node_modules/@npmcli/arborist/lib/arborist/build-ideal-tree.js:757:30)
15 verbose stack     at Arborist.buildIdealTree (/Users/chintansoni/.nvm/versions/node/v22.8.0/lib/node_modules/npm/node_modules/@npmcli/arborist/lib/arborist/build-ideal-tree.js:181:28)
15 verbose stack     at async Promise.all (index 1)
15 verbose stack     at async Arborist.reify (/Users/chintansoni/.nvm/versions/node/v22.8.0/lib/node_modules/npm/node_modules/@npmcli/arborist/lib/arborist/reify.js:131:5)
15 verbose stack     at async Install.exec (/Users/chintansoni/.nvm/versions/node/v22.8.0/lib/node_modules/npm/lib/commands/install.js:150:5)
16 error code EUNSUPPORTEDPROTOCOL
17 error Unsupported URL Type "workspace:": workspace:*
18 silly unfinished npm timer reify 1735367630748
19 silly unfinished npm timer reify:loadTrees 1735367630748
20 silly unfinished npm timer idealTree:buildDeps 1735367630753
21 silly unfinished npm timer idealTree:#root 1735367630753
22 verbose cwd /Users/chintansoni/projects/shadcn-monorepo
23 verbose os Darwin 24.2.0
24 verbose node v22.8.0
25 verbose npm  v10.9.0
26 verbose exit 1
27 verbose code 1
28 error A complete log of this run can be found in: /Users/chintansoni/.npm/_logs/2024-12-28T06_33_50_510Z-debug-0.log

System Info

Macbook Air
Chip: Apple M2
Memory: 8 GB
OS: Sequoia

Before submitting

• I've made research efforts and searched the documentation
• I've searched for existing issues

[pirmax]

Same problem here on WSL on Windows 11 and MacOS too.

[PedroMarianoAlmeida]

As a workaround, you can check my own Turborepo with shadcn as a package

https://github.com/PedroMarianoAlmeida/offical-turbo-v1/tree/main/packages/react/shadcn

I start with this example (https://github.com/vercel/turborepo/tree/main/examples/with-tailwind) and then start working on that

[morganbarber]

Using pnpm solved this issue for me.

[z1haze]

despite the documentation showing the scripts for init for npm, pnpm, bun, etc... clearly the only one they tested was pnpm. I think we have to just dump contents of the example folder into your new project, delete the pnpm stuff, add the workspaces to the package.json, etc.

[evokerking2]

Same

[qwerqy]

I faced this issue while i was on [email protected] (if I'm not mistaken, does not support workspace). Using [email protected] solves the issue