Anaconda: Install specific packages from specific channels using environment.yml

I saw something like

dependencies:
- chanelname::modulename=X.Y.Z

Update
It now implemented:
https://github.com/conda/conda/issues/7202

Old answer
Be carefull since it doesn’t seemed to be implemented. A channel is, by design, a “space” where depencies are robust. So removing this might break dependencies.