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Two small — though important — changes

  1. Since [the release of conda 4.6](https://www.anaconda.com/blog/conda-4-6-release), the [recommended way to activate a conda env](https://docs.conda.io/projects/conda/en/latest/user-guide/tasks/manage-environments.html#activating-an-environment) is to use `conda activate <myenv>`.
  2. The [conda docs say](https://conda.io/projects/conda/en/latest/user-guide/tasks/manage-environments.html#exporting-an-environment-file-across-platforms) that the correct way to export an env is to use the `--from-history` flag.  This only includes packages that you’ve explicitly asked for, and only "pins" versions when you asked to do so.  If you use this flag, the "macOS-specific" packages probably won't appear.
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Mike Boyle 2020-06-29 15:46:05 -04:00 committed by GitHub
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@ -13,16 +13,17 @@ The `environment.yml` file should list all Python libraries on which your notebo
depend, specified as though they were created using the following `conda` commands: depend, specified as though they were created using the following `conda` commands:
``` ```
source activate example-environment conda activate example-environment
conda env export --no-builds -f environment.yml conda env export --from-history -f environment.yml
``` ```
Note that the only libraries available to you will be the ones specified in Note that the only libraries available to you will be the ones specified in
the `environment.yml`, so be sure to include everything that you need! the `environment.yml`, so be sure to include everything that you need!
Also note that conda will possibly try to include OS-specific packages in `environment.yml`, so you Also note that if you skip the `--from-history`, conda may include OS-specific
may have to manually prune `environment.yml` to get rid of these packages. Confirmed Mac-OSX-specific packages in `environment.yml`, which you would have to manually prune from
packages that should be removed are: `environment.yml`. For example, confirmed macOS-specific packages that should
be removed are:
* libcxxabi=4.0.1 * libcxxabi=4.0.1
* appnope=0.1.0 * appnope=0.1.0