fails with latest micromamba

[beckermr]

I am seeing complete failures with the latest micromamba that uses the sharded repodata.

See this job

https://github.com/conda-forge/staged-recipes/actions/runs/26812800716/job/79046879451?pr=32820

vs this job

https://github.com/conda-forge/staged-recipes/actions/runs/26812931831/job/79047337661?pr=32820

cc @SylvainCorlay @JohanMabille @jjerphan

[SylvainCorlay]

Hey @beckermr. We are planning to release 2.70 today. Would you be able to test if it fails with the latest alpha?

[jjerphan]

2.7.0.alpha0 has been released yesterday and fixes many regressions. 2.7.0 will be released soon.

[beckermr]

Will test.

[jjerphan]

conda-forge/micromamba-feedstock#301 and conda-forge/mamba-feedstock#388 on their way.

[beckermr]

I tried to test with the alpha tag, but I don't quite think I got the syntax in gha right: https://github.com/conda-forge/staged-recipes/actions/runs/26831562098/job/79114006960?pr=32820

[jjerphan]

Yes, we need #310.