# Virtual Environments

## Add new packages

Try to install any new package using `conda`. If a package is not available in one of `conda`'s channels you can install it with `pip` but make sure your virtual environment is active.

## Update your conda `environment.yaml`

After installing a new package you can use the following command in your terminal to update your `environment.yaml` before publishing your pipeline. Note that we ignore the package version for `libfortran` to keep compatibility with Linux:

```bash
conda env export --no-builds | sed 's/^.*libgfortran.*$/  - libgfortran/' >  environment.yml
```

## Update and prune your conda environment from a `environment.yaml` file

Execute the following command in your terminal, see these docs for more [information](https://docs.conda.io/projects/conda/en/latest/user-guide/tasks/manage-environments.html#updating-an-environment)

```bash
conda env update --prefix ./env --file environment.yml  --prune
```