diff --git a/packages/atomicwrites/meta.yaml b/packages/atomicwrites/meta.yaml
new file mode 100644
index 000000000..a759c9cd0
--- /dev/null
+++ b/packages/atomicwrites/meta.yaml
@@ -0,0 +1,12 @@
+package:
+  name: atomicwrites
+  version: 1.1.5
+
+source:
+  url: https://pypi.io/packages/source/a/atomicwrites/atomicwrites-1.1.5.tar.gz
+  sha256: 240831ea22da9ab882b551b31d4225591e5e447a68c5e188db5b89ca1d487585
+
+
+test:
+  imports:
+    - atomicwrites
diff --git a/packages/attrs/meta.yaml b/packages/attrs/meta.yaml
new file mode 100644
index 000000000..22c48b2f7
--- /dev/null
+++ b/packages/attrs/meta.yaml
@@ -0,0 +1,15 @@
+package:
+  name: attrs
+  version: 18.1.0
+
+source:
+  url: https://pypi.io/packages/source/a/attrs/attrs-18.1.0.tar.gz
+  sha256: e0d0eb91441a3b53dab4d9b743eafc1ac44476296a2053b6ca3af0b139faf87b
+
+  patches:
+    - patches/use-dummy-threading.patch
+
+
+test:
+  imports:
+    - attr
diff --git a/packages/attrs/patches/use-dummy-threading.patch b/packages/attrs/patches/use-dummy-threading.patch
new file mode 100644
index 000000000..ef5dc1ddc
--- /dev/null
+++ b/packages/attrs/patches/use-dummy-threading.patch
@@ -0,0 +1,16 @@
+diff --git a/src/attr/_make.py b/src/attr/_make.py
+index fc44611..f60016e 100644
+--- a/src/attr/_make.py
++++ b/src/attr/_make.py
+@@ -3,7 +3,10 @@ from __future__ import absolute_import, division, print_function
+ import hashlib
+ import linecache
+ import sys
+-import threading
++try:
++    import threading
++except ImportError:
++    import dummy_threading as threading
+ import warnings
+ 
+ from operator import itemgetter
diff --git a/packages/more-itertools/meta.yaml b/packages/more-itertools/meta.yaml
new file mode 100644
index 000000000..c9462a3a8
--- /dev/null
+++ b/packages/more-itertools/meta.yaml
@@ -0,0 +1,12 @@
+package:
+  name: more-itertools
+  version: 4.3.0
+
+source:
+  url: https://pypi.io/packages/source/m/more-itertools/more-itertools-4.3.0.tar.gz
+  sha256: c476b5d3a34e12d40130bc2f935028b5f636df8f372dc2c1c01dc19681b2039e
+
+
+test:
+  imports:
+    - more_itertools
diff --git a/packages/nose/meta.yaml b/packages/nose/meta.yaml
new file mode 100644
index 000000000..508a28b96
--- /dev/null
+++ b/packages/nose/meta.yaml
@@ -0,0 +1,15 @@
+package:
+  name: nose
+  version: 1.3.7
+
+source:
+  url: https://pypi.io/packages/source/n/nose/nose-1.3.7.tar.gz
+  sha256: f1bffef9cbc82628f6e7d7b40d7e255aefaa1adb6a1b1d26c69a8b79e6208a98
+
+requirements:
+  run:
+    - setuptools
+
+test:
+  imports:
+    - nose
diff --git a/packages/pluggy/meta.yaml b/packages/pluggy/meta.yaml
new file mode 100644
index 000000000..0e81a65a4
--- /dev/null
+++ b/packages/pluggy/meta.yaml
@@ -0,0 +1,12 @@
+package:
+  name: pluggy
+  version: 0.7.1
+
+source:
+  url: https://pypi.io/packages/source/p/pluggy/pluggy-0.7.1.tar.gz
+  sha256: 95eb8364a4708392bae89035f45341871286a333f749c3141c20573d2b3876e1
+
+
+test:
+  imports:
+    - pluggy
diff --git a/packages/py/meta.yaml b/packages/py/meta.yaml
new file mode 100644
index 000000000..2002bd77f
--- /dev/null
+++ b/packages/py/meta.yaml
@@ -0,0 +1,13 @@
+package:
+  name: py
+  version: 1.5.4
+
+source:
+  url: https://pypi.io/packages/source/p/py/py-1.5.4.tar.gz
+  sha256: 3fd59af7435864e1a243790d322d763925431213b6b8529c6ca71081ace3bbf7
+
+
+test:
+  imports:
+    - py
+    - py.code
diff --git a/packages/pytest/meta.yaml b/packages/pytest/meta.yaml
new file mode 100644
index 000000000..032fa4f65
--- /dev/null
+++ b/packages/pytest/meta.yaml
@@ -0,0 +1,23 @@
+package:
+  name: pytest
+  version: 3.6.3
+
+source:
+  url: https://files.pythonhosted.org/packages/55/50/399419c03c39bf41faa7cbd5a8976c076037b2d76adf2535610919806d67/pytest-3.6.3.tar.gz
+  md5: 8ca6124a3a80f9555c50f5c09056ea02
+
+  patches:
+    - patches/named-tmp-and-rm-dup2.patch
+
+requirements:
+  run:
+    - atomicwrites
+    - attrs
+    - more-itertools 
+    - pluggy
+    - py
+    - setuptools
+
+test:
+  imports:
+    - pytest
diff --git a/packages/pytest/patches/named-tmp-and-rm-dup2.patch b/packages/pytest/patches/named-tmp-and-rm-dup2.patch
new file mode 100644
index 000000000..d9f3cf1ce
--- /dev/null
+++ b/packages/pytest/patches/named-tmp-and-rm-dup2.patch
@@ -0,0 +1,61 @@
+diff --git a/src/_pytest/capture.py b/src/_pytest/capture.py
+index faa767a8..518f5c8b 100644
+--- a/src/_pytest/capture.py
++++ b/src/_pytest/capture.py
+@@ -10,7 +10,7 @@ import sys
+ import os
+ import io
+ from io import UnsupportedOperation
+-from tempfile import TemporaryFile
++from tempfile import NamedTemporaryFile as TemporaryFile
+ 
+ import six
+ import pytest
+@@ -471,7 +471,6 @@ class FDCaptureBinary(object):
+                 else:
+                     self.syscapture = NoCapture()
+             self.tmpfile = tmpfile
+-            self.tmpfile_fd = tmpfile.fileno()
+ 
+     def __repr__(self):
+         return "<FDCapture %s oldfd=%s>" % (self.targetfd, self.targetfd_save)
+@@ -482,7 +481,6 @@ class FDCaptureBinary(object):
+             os.fstat(self.targetfd_save)
+         except (AttributeError, OSError):
+             raise ValueError("saved filedescriptor not valid anymore")
+-        os.dup2(self.tmpfile_fd, self.targetfd)
+         self.syscapture.start()
+ 
+     def snap(self):
+@@ -496,18 +494,14 @@ class FDCaptureBinary(object):
+         """ stop capturing, restore streams, return original capture file,
+         seeked to position zero. """
+         targetfd_save = self.__dict__.pop("targetfd_save")
+-        os.dup2(targetfd_save, self.targetfd)
+-        os.close(targetfd_save)
+         self.syscapture.done()
+         _attempt_to_close_capture_file(self.tmpfile)
+ 
+     def suspend(self):
+         self.syscapture.suspend()
+-        os.dup2(self.targetfd_save, self.targetfd)
+ 
+     def resume(self):
+         self.syscapture.resume()
+-        os.dup2(self.tmpfile_fd, self.targetfd)
+ 
+     def writeorg(self, data):
+         """ write to original file descriptor. """
+diff --git a/src/_pytest/pastebin.py b/src/_pytest/pastebin.py
+index 6af202d1..9b192918 100644
+--- a/src/_pytest/pastebin.py
++++ b/src/_pytest/pastebin.py
+@@ -29,7 +29,7 @@ def pytest_configure(config):
+         # when using pytest-xdist, for example
+         if tr is not None:
+             # pastebin file will be utf-8 encoded binary file
+-            config._pastebinfile = tempfile.TemporaryFile("w+b")
++            config._pastebinfile = tempfile.NamedTemporaryFile("w+b")
+             oldwrite = tr._tw.write
+ 
+             def tee_write(s, **kwargs):
diff --git a/packages/setuptools/meta.yaml b/packages/setuptools/meta.yaml
new file mode 100644
index 000000000..4113aac0b
--- /dev/null
+++ b/packages/setuptools/meta.yaml
@@ -0,0 +1,20 @@
+package:
+  name: setuptools
+  version: 40.0.0
+
+source:
+  url: https://pypi.io/packages/source/s/setuptools/setuptools-40.0.0.zip
+  sha256: 012adb8e25fbfd64c652e99e7bab58799a3aaf05d39ab38561f69190a909015f
+
+  patches:
+    - patches/remove-ctypes.patch
+
+requirements:
+  run:
+    - pyparsing
+
+test:
+  imports:
+    - setuptools
+    - easy_install
+    - pkg_resources
diff --git a/packages/setuptools/patches/remove-ctypes.patch b/packages/setuptools/patches/remove-ctypes.patch
new file mode 100644
index 000000000..f009a7d91
--- /dev/null
+++ b/packages/setuptools/patches/remove-ctypes.patch
@@ -0,0 +1,37 @@
+diff --git a/setuptools/glibc.py b/setuptools/glibc.py
+index a134591c..c31fc78a 100644
+--- a/setuptools/glibc.py
++++ b/setuptools/glibc.py
+@@ -2,13 +2,13 @@
+ # https://github.com/pypa/pip/blob/8f4f15a5a95d7d5b511ceaee9ed261176c181970/src/pip/_internal/utils/glibc.py
+ from __future__ import absolute_import
+ 
+-import ctypes
+ import re
+ import warnings
+ 
+ 
+ def glibc_version_string():
+     "Returns glibc version string, or None if not using glibc."
++    import ctypes
+ 
+     # ctypes.CDLL(None) internally calls dlopen(NULL), and as the dlopen
+     # manpage says, "If filename is NULL, then the returned handle is for the
+diff --git a/setuptools/windows_support.py b/setuptools/windows_support.py
+index cb977cff..1ca64fbb 100644
+--- a/setuptools/windows_support.py
++++ b/setuptools/windows_support.py
+@@ -1,5 +1,4 @@
+ import platform
+-import ctypes
+ 
+ 
+ def windows_only(func):
+@@ -17,6 +16,7 @@ def hide_file(path):
+ 
+     `path` must be text.
+     """
++    import ctypes
+     __import__('ctypes.wintypes')
+     SetFileAttributes = ctypes.windll.kernel32.SetFileAttributesW
+     SetFileAttributes.argtypes = ctypes.wintypes.LPWSTR, ctypes.wintypes.DWORD
diff --git a/test/test_testing.py b/test/test_testing.py
new file mode 100644
index 000000000..0808403f7
--- /dev/null
+++ b/test/test_testing.py
@@ -0,0 +1,12 @@
+def test_pytest(selenium):
+    selenium.load_package('pytest')
+    selenium.load_package('numpy')
+    selenium.load_package('nose')
+    selenium.run('from pathlib import Path')
+    selenium.run('import os')
+    selenium.run('import numpy')
+    selenium.run('base_dir = Path(numpy.__file__).parent / "core" / "tests"')
+    selenium.run("import pytest;"
+                 "pytest.main([base_dir / 'test_api.py'])")
+    logs = '\n'.join(selenium.logs)
+    assert 'INTERNALERROR' not in logs