❯ edm install -e foo chaco
No value provided for --version. Assuming 3.8
Fetching indices for runtime repositories. done
Fetching indices for package repositories. done
Fetching indices for runtime repositories. done
Installing runtime... done
The following packages will be installed:

    chaco                5.1.1-1        1022     KiB
    enable               5.3.1-5           3.3   MiB
    fonttools            4.31.1-1        985     KiB
    importlib_resources  5.4.0-1          27     KiB
    intel_openmp         2021.4.28-1       1.1   MiB
    libfreetype          2.12.1-1        637     KiB
    libharfbuzz          3.2.0-4         924     KiB
    liblcms2             2.12-1          197     KiB
    libopenjpeg          2.4.0.post1-1   190     KiB
    libpng               1.6.37-100      242     KiB
    libtiff              4.3.0-2         213     KiB
    libturbojpeg         2.1.2-1         430     KiB
    libzstd              1.5.0-1           1.12  MiB
    mkl                  2021.3.0-1      192.63  MiB
    mkl_service          2.4.0-1          47     KiB
    numpy                1.21.2-2          7.45  MiB
    pillow_simd          9.0.0.post1-2   876     KiB
    pyface               7.4.4-2           2.41  MiB
    traits               6.4.1-1           4.76  MiB
    traitsui             7.4.3-1           2.62  MiB
    zipp                 3.7.0-1           6     KiB

Do you want to continue ? [Y/n]: 
Installing/removing package(s)
chaco               [...................................................................................]

❯ edm shell -e foo
Starting new shell in EDM environment 'foo'.
Type 'exit' or 'Ctrl+D' to return.

$foo ❯ python
Enthought Deployment Manager -- https://www.enthought.com/
Python 3.8.12 |Enthought, Inc. (x86_64)| (default, Sep 27 2021, 11:51:02) 
[Clang 12.0.0 (clang-1200.0.32.29)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from chaco.api import ArrayPlotData                                                    
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/tdiller/.edm/envs/foo/lib/python3.8/site-packages/chaco/api.py", line 343, in <module>
    from chaco.overlays.api import (
  File "/Users/tdiller/.edm/envs/foo/lib/python3.8/site-packages/chaco/overlays/api.py", line 63, in <module>
    from chaco.overlays.layers.api import (
  File "/Users/tdiller/.edm/envs/foo/lib/python3.8/site-packages/chaco/overlays/layers/api.py", line 11, in <module>
    from .status_layer import ErrorLayer, StatusLayer, WarningLayer
  File "/Users/tdiller/.edm/envs/foo/lib/python3.8/site-packages/chaco/overlays/layers/status_layer.py", line 17, in <module>
    from enable.savage.svg.document import SVGDocument
  File "/Users/tdiller/.edm/envs/foo/lib/python3.8/site-packages/enable/savage/svg/document.py", line 27, in <module>
    from . import css
  File "/Users/tdiller/.edm/envs/foo/lib/python3.8/site-packages/enable/savage/svg/css/__init__.py", line 10, in <module>
    from .transform import transformList
  File "/Users/tdiller/.edm/envs/foo/lib/python3.8/site-packages/enable/savage/svg/css/transform.py", line 14, in <module>
    from pyparsing import Group, Literal, Optional, delimitedList
ModuleNotFoundError: No module named 'pyparsing'