Stuck resolving packages when installing

[7k50]

When installing jupyterlab-toc, the process is stuck "resolving packages". As of this writing, I have been waiting roughly 15 minutes and I haven't aborted the process yet. My juputerlab notebook server is running at the time of install.

jupyter labextension install jupyterlab-toc
> /usr/local/bin/npm pack jupyterlab-toc
npm notice 
npm notice 📦  [email protected]
npm notice === Tarball Contents === 
npm notice 1.6kB  package.json       
npm notice 863B   README.md          
npm notice 1.5kB  LICENSE            
npm notice 2.9kB  lib/extension.js   
npm notice 11.3kB lib/generators.js  
npm notice 373B   lib/index.js       
npm notice 1.5kB  lib/registry.js    
npm notice 6.5kB  lib/toc.js         
npm notice 304B   lib/extension.d.ts 
npm notice 1.1kB  lib/generators.d.ts
npm notice 81B    lib/index.d.ts     
npm notice 2.1kB  lib/registry.d.ts  
npm notice 3.2kB  lib/toc.d.ts       
npm notice 2.1kB  style/index.css    
npm notice === Tarball Details === 
npm notice name:          jupyterlab-toc                          
npm notice version:       0.2.1                                   
npm notice filename:      jupyterlab-toc-0.2.1.tgz                
npm notice package size:  9.5 kB                                  
npm notice unpacked size: 35.5 kB                                 
npm notice shasum:        edd570ba1a523e3e2bf5811b9995f9a99e0c4fe4
npm notice integrity:     sha512-toWEuuN9zi3NM[...]qkQRGoDWupk+g==
npm notice total files:   14                                      
npm notice 
jupyterlab-toc-0.2.1.tgz
> node /usr/local/anaconda3/lib/python3.6/site-packages/jupyterlab/staging/yarn.js install
yarn install v1.5.1
(node:2376) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.
info No lockfile found.
[1/4] 🔍  Resolving packages...
⠈ jupyterlab-toc@file:../extensions/jupyterlab-toc-0.2.1.tgz

I am new to jupyter and jupyterlab so please bear with me.

I have installed jupyterlab via conda install -c conda-forge jupyterlab and I have the current version of conda installed since earlier.

I started the jupyterlab notebook at a specific directory: jupyter lab --NotebookApp.notebook_dir=/Users/me/blah/Jupyter/JupyterLab/Notebooks

[7k50]

This seems to be related: https://github.com/jupyter-widgets/ipywidgets/issues/2061

[ian-r-rose]

Hi @winterflags, what versions of node/npm are you using? There is a bug with the version of yarn we are using that prevents us from supporting node 10, and that can cause issues like this.

[khourhin]

Did you install nodejs as specified in https://jupyterlab.readthedocs.io/en/stable/user/extensions.html ? I had the same symptoms before installing it.

Also to avoid downgrading jupyterlab (0.33 > 0.28) using conda, I installed nodejs 8.10.0.

conda install -c conda-forge nodejs=8

jupyter labextension install @jupyterlab/toc

[deisi]

I have the same problem.

npm --version: 6.3.0
node --version: v10.8.0
jupyter lab --version: 0.33.10

Do I understand it correctly that I have to downgrade node?

[ian-r-rose]

For at least a few more hours. We are releasing a new version which includes support for node 10 imminently :)

[deisi]

Okay :) I was about to report, that I made it work by installing jupyterlab from gitbub after following the discussion on https://github.com/jupyter-widgets/ipywidgets/issues/2061