deepchem in the environment.yml needs tensorflow to work

[dacb]

Why deepchem doesn't have a registered dependency on tensorflow is beyond me, but even though it installs without any errors, it cannot be imported, e.g.

(base) dacb@stealth:/mnt/c/Users/dacb/Desktop/ADME-modeling-for-Cargill$ conda activate adme
(adme) dacb@stealth:/mnt/c/Users/dacb/Desktop/ADME-modeling-for-Cargill$ python
Python 3.7.10 | packaged by conda-forge | (default, Feb 19 2021, 16:07:37)
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import deepchem
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/dacb/miniconda3/envs/adme/lib/python3.7/site-packages/deepchem/__init__.py", line 10, in <module>
    import deepchem.hyper
  File "/home/dacb/miniconda3/envs/adme/lib/python3.7/site-packages/deepchem/hyper/__init__.py", line 2, in <module>
    from deepchem.hyper.base_classes import HyperparamOpt
  File "/home/dacb/miniconda3/envs/adme/lib/python3.7/site-packages/deepchem/hyper/base_classes.py", line 5, in <module>
    from deepchem.trans import Transformer
  File "/home/dacb/miniconda3/envs/adme/lib/python3.7/site-packages/deepchem/trans/__init__.py", line 6, in <module>
    from deepchem.trans.transformers import undo_transforms
  File "/home/dacb/miniconda3/envs/adme/lib/python3.7/site-packages/deepchem/trans/transformers.py", line 13, in <module>
    import tensorflow as tf
ModuleNotFoundError: No module named 'tensorflow'