Install error - yarn network connection

I am behind a corporate proxy. However, I have all of my proxy and ssl settings set up in ~/.npmrc and ~/.yarnrc, and use npm to install things all the time.

I’ve installed various other labextensions with no problem, but jupyterlab-git extension fails when I install it using jupyter labextension install @jupyterlab/git or if I clone and install directly. It always fails at:

Building jupyterlab assets (build:prod:minimize)
> node /u/dramsoft/miniconda3/envs/jupyterhub/lib/python3.7/site-packages/jupyterlab/staging/yarn.js install --non-interactive
yarn install v1.19.0
[1/5] Validating package.json...
[2/5] Resolving packages...
info There appears to be trouble with your network connection. Retrying...
info There appears to be trouble with your network connection. Retrying...
info There appears to be trouble with your network connection. Retrying...
info There appears to be trouble with your network connection. Retrying...
error Couldn't find package "nbdime@~5.0.1" required by "@jupyterlab/git@file:../extensions/jupyterlab-git-0.8.2.tgz" on the "npm" registry.
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.


npm dependencies failed to install
Traceback (most recent call last):

  File "/u/dramsoft/miniconda3/envs/jupyterhub/lib/python3.7/site-packages/jupyterlab/debuglog.py", line 47, in debug_logging
    yield

  File "/u/dramsoft/miniconda3/envs/jupyterhub/lib/python3.7/site-packages/jupyterlab/labextensions.py", line 105, in start
    core_config=self.core_config)

  File "/u/dramsoft/miniconda3/envs/jupyterhub/lib/python3.7/site-packages/jupyterlab/commands.py", line 378, in build
    command=command, clean_staging=clean_staging)

  File "/u/dramsoft/miniconda3/envs/jupyterhub/lib/python3.7/site-packages/jupyterlab/commands.py", line 574, in build
    raise RuntimeError(msg)

RuntimeError: npm dependencies failed to install

Exiting application: jupyter

Whenever I search for yarn installation problems, the solution always seems to increase the network-timeout. I’ve done that in ~/.yarnrc, but I don’t think it’s taking effect. I updated site-packages/jupyterlab/staging/.yarnrc, and confirmed this .yarnrc was being copied into the jupyter/lab/staging area, but again, same error.

I can run standalone npm and download the nbdime package that is failing in yarn.

So what other settings can I change, or can I force to install with npm instead of yarn?

[joelion]

@fcollonval - i am using the jlpm bundled in JupyterLab, and it is 1.15.2. The 1.19.0 you were seeing was my yarn version. Or, should jlpm and yarn be the same version…? Below is the yarn error when I run jlpm install

$ which yarn
/u/dramsoft/miniconda3/envs/jupyterhub/bin/yarn

$ yarn --version
1.19.0

$ which jlpm
/u/dramsoft/miniconda3/envs/jupyterhub/bin/jlpm

$ jlpm --version
1.15.2

$ jlpm install
yarn install v1.15.2
[1/4] Resolving packages...
[2/4] Fetching packages...
info There appears to be trouble with your network connection. Retrying...
info There appears to be trouble with your network connection. Retrying...
info There appears to be trouble with your network connection. Retrying...
info There appears to be trouble with your network connection. Retrying...
info There appears to be trouble with your network connection. Retrying...
error An unexpected error occurred: "https://registry.yarnpkg.com/@jupyterlab/coreutils/-/coreutils-3.1.0.tgz: ESOCKETTIMEDOUT".
info If you think this is a bug, please open a bug report with the information provided in "/home/dramsoft/jupyterhub/extensions/jupyterlab-git/yarn-error.log".
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.
info There appears to be trouble with your network connection. Retrying...
info There appears to be trouble with your network connection. Retrying...
info There appears to be trouble with your network connection. Retrying...

Thanks @marskar. I, too, downloaded jupyterlab-git and tried to install it from source, but I run into the same error when it tries to install dependencies.

[timenet2300]

check this: conda install -c conda-forge nodejs. it might work