diff --git a/src/zipline/assets/_assets.pyx b/src/zipline/assets/_assets.pyx
index 69de80f504..3791e3d1d8 100644
--- a/src/zipline/assets/_assets.pyx
+++ b/src/zipline/assets/_assets.pyx
@@ -33,7 +33,7 @@ import numpy as np
 from numpy cimport int64_t
 import warnings
 cimport numpy as np
-import numpy; numpy.import_array()
+
 
 from zipline.utils.calendar_utils import get_calendar
 
diff --git a/src/zipline/assets/continuous_futures.pyx b/src/zipline/assets/continuous_futures.pyx
index 496b879a0f..718bbd445e 100644
--- a/src/zipline/assets/continuous_futures.pyx
+++ b/src/zipline/assets/continuous_futures.pyx
@@ -26,15 +26,14 @@ from cpython.object cimport (
     Py_GT,
     Py_LT,
 )
-from cpython cimport bool
-import numpy; numpy.import_array()
+# from cpython cimport bool
 from functools import partial
 
 from numpy import array, empty, iinfo
 from numpy cimport int64_t, int64_t
 from pandas import Timestamp
 from zipline.utils.calendar_utils import get_calendar
-import warnings
+# import warnings
 
 
 def delivery_predicate(codes, contract):
@@ -257,7 +256,7 @@ cdef class ContinuousFuture:
 
     def is_exchange_open(self, dt_minute):
         """
-        
+
         Parameters
         ----------
         dt_minute: pd.Timestamp (UTC, tz-aware)
diff --git a/src/zipline/data/_adjustments.pyx b/src/zipline/data/_adjustments.pyx
index 458bc17618..a85ba462c1 100644
--- a/src/zipline/data/_adjustments.pyx
+++ b/src/zipline/data/_adjustments.pyx
@@ -25,8 +25,6 @@ from numpy import (
     zeros,
 )
 from numpy cimport float64_t, int64_t, ndarray
-import numpy
-numpy.import_array()
 from pandas import Timestamp
 
 ctypedef object Timestamp_t
diff --git a/src/zipline/data/_equities.pyx b/src/zipline/data/_equities.pyx
index 784e2351f6..a480a24397 100644
--- a/src/zipline/data/_equities.pyx
+++ b/src/zipline/data/_equities.pyx
@@ -32,7 +32,6 @@ from numpy cimport (
     uint8_t,
 )
 from numpy.math cimport NAN
-import numpy; numpy.import_array()
 ctypedef object carray_t
 ctypedef object ctable_t
 ctypedef object Timestamp_t
diff --git a/src/zipline/data/_minute_bar_internal.pyx b/src/zipline/data/_minute_bar_internal.pyx
index 76788f5aa7..8dee07b2da 100644
--- a/src/zipline/data/_minute_bar_internal.pyx
+++ b/src/zipline/data/_minute_bar_internal.pyx
@@ -1,5 +1,4 @@
 from numpy cimport ndarray, int64_t
-import numpy; numpy.import_array()
 from numpy import searchsorted
 from cpython cimport bool
 cimport cython
diff --git a/src/zipline/data/_resample.pyx b/src/zipline/data/_resample.pyx
index d79771890f..0e336f6d60 100644
--- a/src/zipline/data/_resample.pyx
+++ b/src/zipline/data/_resample.pyx
@@ -14,7 +14,7 @@
 from cython cimport boundscheck, wraparound
 from numpy import finfo, float64, nan, isnan
 from numpy cimport intp_t, float64_t, uint32_t
-import numpy; numpy.import_array()
+
 
 @boundscheck(False)
 @wraparound(False)
diff --git a/src/zipline/gens/sim_engine.pyx b/src/zipline/gens/sim_engine.pyx
index a8eb51bc24..b15a70fcc9 100644
--- a/src/zipline/gens/sim_engine.pyx
+++ b/src/zipline/gens/sim_engine.pyx
@@ -15,7 +15,6 @@
 
 cimport cython
 cimport numpy as np
-import numpy; numpy.import_array()
 import numpy as np
 import pandas as pd
 from cpython cimport bool
diff --git a/src/zipline/lib/_factorize.pyx b/src/zipline/lib/_factorize.pyx
index 5e269d2392..4d448da56d 100644
--- a/src/zipline/lib/_factorize.pyx
+++ b/src/zipline/lib/_factorize.pyx
@@ -5,17 +5,13 @@ from cpython cimport Py_LT
 from libc.math cimport log
 cimport numpy as np
 import numpy as np
-np.import_array()
 
-from zipline.utils.numpy_utils import unsigned_int_dtype_with_size_in_bytes
-
-np.import_array()
 
+from zipline.utils.numpy_utils import unsigned_int_dtype_with_size_in_bytes
 
 cdef inline double log2(double d):
     return log(d) / log(2);
 
-
 cpdef inline smallest_uint_that_can_hold(Py_ssize_t maxval):
     """Choose the smallest numpy unsigned int dtype that can hold ``maxval``.
     """
@@ -32,14 +28,12 @@ cpdef inline smallest_uint_that_can_hold(Py_ssize_t maxval):
             _int_sizes[int(np.ceil(log2(maxval) / 8))]
         )
 
-
 ctypedef fused unsigned_integral:
     np.uint8_t
     np.uint16_t
     np.uint32_t
     np.uint64_t
 
-
 cdef class _NoneFirstSortKey:
     """Box to sort ``None`` to the front of the categories list.
     """
@@ -51,13 +45,12 @@ cdef class _NoneFirstSortKey:
     def __richcmp__(_NoneFirstSortKey self, _NoneFirstSortKey other, int op):
         if op == Py_LT:
             return (
-                self.value is None or
-                (other.value is not None and self.value < other.value)
+                    self.value is None or
+                    (other.value is not None and self.value < other.value)
             )
 
         return NotImplemented
 
-
 cdef factorize_strings_known_impl(np.ndarray[object] values,
                                   Py_ssize_t nvalues,
                                   list categories,
@@ -78,7 +71,6 @@ cdef factorize_strings_known_impl(np.ndarray[object] values,
 
     return codes, np.asarray(categories, dtype=object), reverse_categories
 
-
 cpdef factorize_strings_known_categories(np.ndarray[object] values,
                                          list categories,
                                          object missing_value,
@@ -133,7 +125,6 @@ cpdef factorize_strings_known_categories(np.ndarray[object] values,
     else:
         raise ValueError('ncategories larger than uint64')
 
-
 cdef factorize_strings_impl(np.ndarray[object] values,
                             object missing_value,
                             bint sort,
@@ -181,10 +172,8 @@ cdef factorize_strings_impl(np.ndarray[object] values,
 
     return codes, categories_array, reverse_categories
 
-
 cdef list _int_sizes = [1, 1, 2, 4, 4, 8, 8, 8, 8]
 
-
 cpdef factorize_strings(np.ndarray[object] values,
                         object missing_value,
                         int sort):
diff --git a/src/zipline/lib/_float64window.pyx b/src/zipline/lib/_float64window.pyx
index 07c279d625..1747b014e3 100644
--- a/src/zipline/lib/_float64window.pyx
+++ b/src/zipline/lib/_float64window.pyx
@@ -2,7 +2,6 @@
 float specialization of AdjustedArrayWindow
 """
 from numpy cimport float64_t
-import numpy; numpy.import_array()
 ctypedef float64_t[:, :] databuffer
 
 include "_windowtemplate.pxi"
diff --git a/src/zipline/lib/_int64window.pyx b/src/zipline/lib/_int64window.pyx
index 84b8b56467..d30b97cac4 100644
--- a/src/zipline/lib/_int64window.pyx
+++ b/src/zipline/lib/_int64window.pyx
@@ -2,7 +2,6 @@
 datetime specialization of AdjustedArrayWindow
 """
 from numpy cimport int64_t
-import numpy; numpy.import_array()
 
 ctypedef int64_t[:, :] databuffer
 
diff --git a/src/zipline/lib/_uint8window.pyx b/src/zipline/lib/_uint8window.pyx
index 7e2aeb4756..8b8ce98b2b 100644
--- a/src/zipline/lib/_uint8window.pyx
+++ b/src/zipline/lib/_uint8window.pyx
@@ -2,7 +2,6 @@
 bool specialization of AdjustedArrayWindow
 """
 from numpy cimport uint8_t
-import numpy; numpy.import_array()
 
 ctypedef uint8_t[:, :] databuffer
 
diff --git a/src/zipline/lib/adjustment.pyx b/src/zipline/lib/adjustment.pyx
index 71c4872fb4..be42ab646c 100644
--- a/src/zipline/lib/adjustment.pyx
+++ b/src/zipline/lib/adjustment.pyx
@@ -1,12 +1,11 @@
 # cython: embedsignature=True
 from cpython cimport Py_EQ
 
-cimport cython
+# cimport cython
 from pandas import isnull, Timestamp
 cimport numpy as np
 from numpy cimport float64_t, uint8_t, int64_t
 from numpy import asarray, datetime64, float64, int64, bool_, uint8
-import numpy; numpy.import_array()
 
 from zipline.utils.compat import unicode
 
diff --git a/src/zipline/lib/rank.pyx b/src/zipline/lib/rank.pyx
index d807276d3b..0128415c71 100644
--- a/src/zipline/lib/rank.pyx
+++ b/src/zipline/lib/rank.pyx
@@ -2,9 +2,8 @@
 Functions for ranking and sorting.
 """
 cimport cython
-cimport numpy as np
-import numpy; numpy.import_array()
 import numpy as np
+cimport numpy as np
 from cpython cimport bool
 from scipy.stats import rankdata
 from zipline.utils.numpy_utils import is_missing
diff --git a/src/zipline/utils/cache.py b/src/zipline/utils/cache.py
index 3d220421dd..9bed4fa1c9 100644
--- a/src/zipline/utils/cache.py
+++ b/src/zipline/utils/cache.py
@@ -5,7 +5,9 @@
 from functools import partial
 import os
 import pickle
-from distutils import dir_util
+
+# from distutils import dir_util
+from shutil import copytree
 from shutil import rmtree, move
 from tempfile import mkdtemp, NamedTemporaryFile
 
@@ -371,7 +373,7 @@ def getpath(self, *path_parts):
 
     def _commit(self):
         """Sync the temporary directory to the final path."""
-        dir_util.copy_tree(self.path, self._final_path)
+        copytree(src=self.path, dst=self._final_path, dirs_exist_ok=True)
 
     def __enter__(self):
         return self