Error with sklearn on installing by pip

[wook2014]

I am trying to install altanalyze in a conda environment on linux server. I tried to install directly by pip install AltAnalyze but there comes an error:

ERROR: Command errored out with exit status 1:
     command: /data/bioinf/jyuan/miniconda/altanalyse/bin/python -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-kzJa7S/sklearn/setup.py'"'"'; __file__='"'"'/tmp/pip-install-kzJa7S/sklearn/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-pip-egg-info-mMZ7G6
         cwd: /tmp/pip-install-kzJa7S/sklearn/
    Complete output (5 lines):
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-install-kzJa7S/sklearn/setup.py", line 9, in <module>
        with open("README.md", encoding='utf-8') as f:
    TypeError: 'encoding' is an invalid keyword argument for this function
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

I tried to download the sklearn-0.0.post9.tar.gz , changed the line which occurs the problem according to:
https://stackoverflow.com/questions/12541370/typeerror-encoding-is-an-invalid-keyword-argument-for-this-function
from

with open("README.md", encoding='utf-8') as f:

to

import io
with io.open("README.md", encoding='utf-8') as f:

and install it before altanalyze but it seemed that sklearn is not supported now:

The 'sklearn' PyPI package is deprecated, use 'scikit-learn'
rather than 'sklearn' for pip commands. 

Here is how to fix this error in the main use cases:
- use 'pip install scikit-learn' rather than 'pip install sklearn'
- replace 'sklearn' by 'scikit-learn' in your pip requirements files
  (requirements.txt, setup.py, setup.cfg, Pipfile, etc ...)
- if the 'sklearn' package is used by one of your dependencies,
  it would be great if you take some time to track which package uses
  'sklearn' instead of 'scikit-learn' and report it to their issue tracker
- as a last resort, set the environment variable
  SKLEARN_ALLOW_DEPRECATED_SKLEARN_PACKAGE_INSTALL=True to avoid this error

More information is available at
https://github.com/scikit-learn/sklearn-pypi-package

If the previous advice does not cover your use case, feel free to report it at
https://github.com/scikit-learn/sklearn-pypi-package/issues/new

Is there any update on scikit-learn to fix the problem?