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/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
index ce5c5ecf4..955c6975d 100644
--- a/packages/pytest/meta.yaml
+++ b/packages/pytest/meta.yaml
@@ -5,3 +5,15 @@ package:
 source:
   url: https://files.pythonhosted.org/packages/55/50/399419c03c39bf41faa7cbd5a8976c076037b2d76adf2535610919806d67/pytest-3.6.3.tar.gz
   md5: 8ca6124a3a80f9555c50f5c09056ea02
+
+requirements:
+  run:
+    - atomicwrites
+    - attrs
+    - more-itertools 
+    - pluggy
+    - py
+
+test:
+  imports:
+    - pytest
diff --git a/packages/six/meta.yaml b/packages/six/meta.yaml
new file mode 100644
index 000000000..bdd1f3043
--- /dev/null
+++ b/packages/six/meta.yaml
@@ -0,0 +1,12 @@
+package:
+  name: six
+  version: 1.11.0
+
+source:
+  url: https://pypi.io/packages/source/s/six/six-1.11.0.tar.gz
+  sha256: 70e8a77beed4562e7f14fe23a786b54f6296e34344c23bc42f07b15018ff98e9
+
+
+test:
+  imports:
+    - six