.................................................................
======================================================================
FAIL: sklearn.linear_model.tests.test_logistic.test_max_iter
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/nix/store/8wbvq1w96h4mmgrn0nxixlkmjd84biii-python3.6-nose-1.3.7/lib/python3.6/site-packages/nose/case.py", line 197, in runTest
    self.test(*self.arg)
  File "/nix/store/a4hmi7338y3738lyklvps2ab687wypdm-python3.6-scikit-learn-0.19.1/lib/python3.6/site-packages/sklearn/utils/testing.py", line 291, in wrapper                                                                                                                             
    return fn(*args, **kwargs)
  File "/nix/store/a4hmi7338y3738lyklvps2ab687wypdm-python3.6-scikit-learn-0.19.1/lib/python3.6/site-packages/sklearn/linear_model/tests/test_logistic.py", line 1023, in test_max_iter                                                                                                   
    assert_equal(lr.n_iter_[0], max_iter)
AssertionError: 0 != 1
    '0 != 1' = '%s != %s' % _common_shorten_repr(0, 1)
    '0 != 1' = self._formatMessage('0 != 1', '0 != 1')
>>  raise self.failureException('0 != 1')


----------------------------------------------------------------------
Ran 8229 tests in 170.089s

FAILED (SKIP=62, failures=1)
builder for '/nix/store/j6q7i7vaynv4cfpq7rwqr3qng8w6yiw3-python3.6-scikit-learn-0.19.1.drv' failed with exit code 1
cannot build derivation '/nix/store/b8zf7b5hd3gzzc9xwrnn0pji5bz9rdi2-python3-3.6.5-env.drv': 1 dependencies couldn't be built
error: build of '/nix/store/b8zf7b5hd3gzzc9xwrnn0pji5bz9rdi2-python3-3.6.5-env.drv' failed

with import <nixpkgs> {};

(let
  python = let
    packageOverrides = self: super: rec {
    };
  in pkgs.python3.override {inherit packageOverrides;};

in python.withPackages(ps: with ps; [
  scikitlearn
])).env