Subject - Getting error while installing XSPEC model

[tanima14]

Can you please guide me how to resolve this issue?

(base) tanima@Tanimas-MacBook-Air ~ % conda create --name threeml -c conda-forge -c xspecmodels python=3.9 xspec-modelsonly numpy scipy matplotlib
Channels:

• conda-forge
• xspecmodels
• defaults
  Platform: osx-arm64
  Collecting package metadata (repodata.json): done
  Solving environment: failed

PackagesNotFoundError: The following packages are not available from current channels:

• xspec-modelsonly

Current channels:

• https://conda.anaconda.org/conda-forge
• https://conda.anaconda.org/xspecmodels
• defaults

To search for alternate channels that may provide the conda package you're
looking for, navigate to

https://anaconda.org

and use the search bar at the top of the page.