Infos

The access to the anaconda "main" channel has been blocked due to licensing changes:

https://www.anaconda.com/blog/update-on-anacondas-terms-of-service-for-academia-and-research

You need to completely remove the main channel from your personal config, i.e., from ~/.condarc.

In the channels section, the main channel is usually called defaults or given as two URLs:

• https://repo.anaconda.com/pkgs/main
• https://repo.anaconda.com/pkgs/r

Instead, you need to insert conda-forge into the channel list if it is not already on the list.

You can use the following command to check if your config is correct:

The output should not contain any variant of the main channel.

If you do not have a ~/.condarc, you need to create the file with the following contents:

For new installations, it is easiest to use miniforge, which is miniconda where defaults is replaced by conda-forge out of the box:

https://github.com/conda-forge/miniforge