CI fails after latest micromamba release

[anutosh491]

Hey @jjerphan,

We see this following failure here : https://github.com/compiler-research/xeus-cpp/actions/runs/25147550283/job/73710605245
while fetching packages from the env.

  Fetch Shard Index for conda-forge/noarch                                                        ⧖ Starting
  Fetch Shard Index for conda-forge/noarch                                                  ✔ Done (0.1 sec)
  Fetch Shard Index for conda-forge/osx-arm64                                                     ⧖ Starting
  Fetch Shard Index for conda-forge/osx-arm64                                               ✔ Done (0.1 sec)
  Fetching and Parsing Packages' Shards                                                           ⧖ Starting
  Fetching and Parsing Packages' Shards                                                     ✔ Done (3.8 sec)
  Using Cached Shard Index for conda-forge/noarch                                                     ✔ Done
  Using Cached Shard Index for conda-forge/osx-arm64                                                  ✔ Done
  Fetching and Parsing Packages' Shards                                                           ⧖ Starting
  Fetching and Parsing Packages' Shards                                                     ✔ Done (0.1 sec)
  
  Resolving Environment                                                                           ⧖ Starting
  Resolving Environment                                                                     ✔ Done (0.4 sec)
  Using Cached Shard Index for conda-forge/noarch                                                     ✔ Done
  Using Cached Shard Index for conda-forge/osx-arm64                                                  ✔ Done
  Fetching and Parsing Packages' Shards                                                           ⧖ Starting
  Fetching and Parsing Packages' Shards                                                     ✔ Done (0.3 sec)
  Using Cached Shard Index for conda-forge/noarch                                                     ✔ Done
  Using Cached Shard Index for conda-forge/osx-arm64                                                  ✔ Done
  Fetching and Parsing Packages' Shards                                                           ⧖ Starting
  Fetching and Parsing Packages' Shards                                                     ✔ Done (0.1 sec)
  
  Resolving Environment                                                                           ⧖ Starting
  Resolving Environment                                                                     ✔ Done (0.8 sec)
  error    libmamba Could not solve for environment specs
      The following package could not be installed
      └─ cppinterop >=1.9 * does not exist (perhaps a typo or a missing channel).
  critical libmamba Could not solve for environment specs

Could you help us figure out why this happens ?

[jjerphan]

#483 should fix this issue.