sklearn compatibility

4 jobs for master in 59 seconds (queued for 6 seconds)
Name Stage Failure
failed
tests Test
  File "/tmp/easy_install-k4nyrucc/scikit-learn-0.24.0/setup.py", line 302, in setup_package
File "/usr/lib/python3/dist-packages/numpy/distutils/core.py", line 135, in setup
config = configuration()
File "/tmp/easy_install-k4nyrucc/scikit-learn-0.24.0/setup.py", line 186, in configuration
setup(name=name,
File "/tmp/easy_install-k4nyrucc/scikit-learn-0.24.0/sklearn/_build_utils/__init__.py", line 30, in _check_cython_version
ModuleNotFoundError: Please install Cython with a version >= 0.28.5 in order to build a scikit-learn from source.
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1

failed
pages Test
      File "/tmp/pip-build-28obwy_z/scikit-learn/sklearn/_build_utils/__init__.py", line 30, in _check_cython_version
raise ModuleNotFoundError(message) from e
ModuleNotFoundError: Please install Cython with a version >= 0.28.5 in order to build a scikit-learn from source.

----------------------------------------
Can't rollback scikit-learn, nothing uninstalled.
Command "/usr/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-28obwy_z/scikit-learn/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-7cnhwd_k-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-28obwy_z/scikit-learn/
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1

failed
doc Test
      File "/tmp/pip-build-rlmx7oyq/scikit-learn/sklearn/_build_utils/__init__.py", line 30, in _check_cython_version
raise ModuleNotFoundError(message) from e
ModuleNotFoundError: Please install Cython with a version >= 0.28.5 in order to build a scikit-learn from source.

----------------------------------------
Can't rollback scikit-learn, nothing uninstalled.
Command "/usr/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-rlmx7oyq/scikit-learn/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-blubh4nv-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-rlmx7oyq/scikit-learn/
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1