Create new conda environments. More information: https://docs.conda.io/projects/conda/en/latest/commands/create.html.
py39, and install Python 3.9 and NumPy v1.11 or above in it:conda create {{[-y|--yes]}} {{[-n|--name]}} {{py39}} python={{3.9}} "{{numpy>=1.11}}"
conda create --clone {{py39}} {{[-n|--name]}} {{py39-copy}}
conda create {{[-n|--name]}} {{env_name}} {{package}}