Solving environment: Stuck on Mac

JupyterLab
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1

I created a environment by conda activate env and then input

conda install -c conda-forge jupyterlab

then I am stuck by

Collecting package metadata (current_repodata.json): done

Solving environment: failed with initial frozen solve. Retrying with flexible solve.

Solving environment: failed with repodata from current_repodata.json, will retry with next repodata source.

Collecting package metadata (repodata.json): done

Solving environment: -

I can install other libraries, but am only stuck by jupyterlab

2

Please try mamba: it is both faster, and gives better error messages when it fails.

Combine this with a (checked in) environment.yml that more full specifies what you need rather than iteratively re-solving. Whether creating or updating the mamba env update path is a good one to learn, as you only need to know one command.

Putting these together:

# environment.yml
channels:
- conda-forge
- nodefaults
dependencies:
- jupyterlab
# not _required_, but it's best to have _something_ to pare down the solve
- python >=3.10,<3.11

then:

mamba env update --file environment.yml --name my-env

Finally, you can use conda-lock to generate long-term reproducible environments, even for multiple platforms.

1 Like
3

I got this and was stuck by:

conda install mamba -n base -c conda-forge

Collecting package metadata (current_repodata.json): done

Solving environment: failed with initial frozen solve. Retrying with flexible solve.

Solving environment: \ 0^[failed with repodata from current_repodata.json, will retry with next repodata source.

Collecting package metadata (repodata.json): done

Solving environment: /
4

Then perhaps start with a brand new Mambaforge:

The very latest version 4.14.0-0 might be flaky, so a slightly older one might be better.