Mamba example 6 seems to be failing

[dsobral]

https://github.com/conda-incubator/setup-miniconda/actions/workflows/example-6.yml

[oursland]

The issue is that defaults/noarch::conda-libmamba-solver-23.12.0 is being installed, even if you remove the defaults channel. This is not compatible, nor should it be selected.

[isaacsanders]

This also seems like it could be a problem with the release of mamba 2 last week.

[isaacsanders]

A person on a team I work with used a non-2.0.0 mamba-version parameter, and it worked.

[jaimergp]

See the implicit channels PR at #367, we need condabin/mamba present in mamba v2 too.

[philmod-h]

We started to get failures like ERROR: executing pre_install.sh failed yesterday.

Is there any way to fix it short term?

Our step:

- uses: conda-incubator/setup-miniconda@v3
        with:
          miniforge-variant: Mambaforge
          miniforge-version: latest
          activate-environment: ...
          use-mamba: true
          python-version: "3.10.14"

I tried to pin mamba with mamba-version: "1.5.10", but no dice.

[jaimergp]

Use Miniforge, which is identical to Mambaforge these days. Mambaforge is getting sunset by EOY.

[mattwthompson]

mamba-version: "1.5.10" works for me

[jaimergp]

A fix for mamba v2 is underway at #368, but I'm facing some issues in Windows. If someone wants to give it a try, I guess this would work:

      - uses: conda-incubator/setup-miniconda@fix-mamba-v2
        with:
          miniforge-variant: Miniforge
          miniforge-version: latest
          use-mamba: true
          mamba-version: "*"