Cannot install on windows about jupyterlab-feedstock HOT 11 CLOSED

In fact this also has a problem:

Edit: Changed the first line of the example to include --override-channels to reproduce the issue.

>conda create -n jlabtutorial -c conda-forge  --override-channels python=3.7 nodejs
Collecting package metadata (current_repodata.json): done
Solving environment: failed
Collecting package metadata (repodata.json): done
Solving environment: failed

PackagesNotFoundError: The following packages are not available from current channels:

  - nodejs -> vs2015_runtime
  - python=3.7 -> openssl[version='>=1.1.1a,<1.1.2a'] -> vc=14

Current channels:

  - https://conda.anaconda.org/conda-forge/win-64
  - https://conda.anaconda.org/conda-forge/noarch

To search for alternate channels that may provide the conda package you're
looking for, navigate to

    https://anaconda.org

and use the search bar at the top of the page.

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@mariusvniekerk -- any ideas here?

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@jasongrout Perhaps related to conda-forge/jupyterlab_server-feedstock#9 , from 5 days ago?

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@jasongrout -- as a workaround, don't use the --override-channels option. pulling from defaults and conda-forge seems to work (the environment is currently installing, so I haven't tested functionality yet)

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It looks like the issue is that neither vc nor vs_2015_runtime are in conda-forge on the main label.

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@jasongrout -- the decision was mad to stop vendoring the microsoft runtimes in conda-forge because 1) doing so was causing conflicts within conda-forge because of compilation against different versions of the runtime and 2) conda-forge does not build the runtime. The runtimes are pulled from defaults.

You can accomplish what you want (conda-forge first, ignoring whatever other channel settings the user may have) with:

conda create -n jlabtutorial --strict-channel-priority -c conda-forge -c defaults  --override-channels python=3.7 nodejs

When I do that on windows everything comes from conda-forge except the runtimes, which are pulled from defaults.

I don't think there is anything to fix -- if this workaround works for you the issue can be closed.

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the decision was mad to stop vendoring the microsoft runtimes

I assume you mean "made", not "mad" as in it was insane to stop vendoring runtimes?

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Oops, yes "made" 🤣

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@mwcraig Thats the correct approach.

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To be more precise, for people that have redefined the defaults channel, this works:

conda create -n jlabtutorial --strict-channel-priority -c conda-forge -c anaconda  --override-channels python=3.7 nodejs

Does that look right to you?

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Also this works:

conda create -n jlabtutorial --strict-channel-priority -c conda-forge -c anaconda  --override-channels jupyterlab=1

I suppose if you wanted to be really strict, you'd do something like

conda create -n jlabtutorial --override-channels -c anaconda <vc runtime packages>
conda activate jlabtutorial
conda install --override-channels -c conda-forge <rest of packages>

Thanks again! Closing as answered

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