Unexpected input(s) '$channels', valid inputs are ['installer-url', 'miniconda-version', 'miniforge-variant', 'miniforge-version', 'conda-version', 'conda-build-version', 'environment-file', 'activate-environment', 'python-version', 'add-anaconda-token', 'add-pip-as-python-dependency', 'allow-softlinks', 'auto-activate-base', 'auto-update-conda', 'condarc-file', 'channel-alias', 'channel-priority', 'channels', 'show-channel-urls', 'use-only-tar-bz2', 'remove-profiles', 'mamba-version', 'use-mamba', 'architecture', 'clean-patched-environment-file', 'run-post']

Mamba support is still experimental and can result in differently solved environments!