From aa8ff56401728ac23c074b2b027e2f44a1111d51 Mon Sep 17 00:00:00 2001
From: Mario Rodas <marsam@users.noreply.github.com>
Date: Mon, 12 Nov 2018 18:12:13 -0500
Subject: [PATCH] python3Packages.async_generator: fix build on python3.5

---
 pkgs/development/python-modules/async_generator/default.nix | 5 ++++-
 pkgs/development/python-modules/pytest-asyncio/default.nix  | 5 +++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/pkgs/development/python-modules/async_generator/default.nix b/pkgs/development/python-modules/async_generator/default.nix
index 6bf77ecd75e..b8ec2f54476 100644
--- a/pkgs/development/python-modules/async_generator/default.nix
+++ b/pkgs/development/python-modules/async_generator/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi, pythonOlder, pytest, pytest-asyncio }:
+{ lib, buildPythonPackage, fetchPypi, pythonOlder, isPy35, pytest, pytest-asyncio }:
 
 buildPythonPackage rec {
   pname = "async_generator";
@@ -17,6 +17,9 @@ buildPythonPackage rec {
     pytest -W error -ra -v --pyargs async_generator
   '';
 
+  # disable tests on python3.5 to avoid circular dependency with pytest-asyncio
+  doCheck = !isPy35;
+
   meta = with lib; {
     description = "Async generators and context managers for Python 3.5+";
     homepage = https://github.com/python-trio/async_generator;
diff --git a/pkgs/development/python-modules/pytest-asyncio/default.nix b/pkgs/development/python-modules/pytest-asyncio/default.nix
index 6b4ce6f6123..24602c52260 100644
--- a/pkgs/development/python-modules/pytest-asyncio/default.nix
+++ b/pkgs/development/python-modules/pytest-asyncio/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, pytest, isPy3k }:
+{ stdenv, buildPythonPackage, fetchPypi, pytest, isPy3k, isPy35, async_generator }:
 buildPythonPackage rec {
   pname = "pytest-asyncio";
   version = "0.9.0";
@@ -10,7 +10,8 @@ buildPythonPackage rec {
     sha256 = "fbd92c067c16111174a1286bfb253660f1e564e5146b39eeed1133315cf2c2cf";
   };
 
-  buildInputs = [ pytest ];
+  buildInputs = [ pytest ]
+    ++ stdenv.lib.optionals isPy35 [ async_generator ];
 
   # No tests in archive
   doCheck = false;