pythonPackages.pyristent: add pytestrunner, fix build

pkgs/development/python-modules/pyrsistent/default.nix

@@ -4,6 +4,7 @@
 , six
 , pytest
 , hypothesis
+, pytestrunner
 }:
 
 buildPythonPackage rec {
@@ -16,11 +17,11 @@ buildPythonPackage rec {
   };
 
   propagatedBuildInputs = [ six ];
-  buildInputs = [ pytest hypothesis ];
 
-  checkPhase = ''
-    py.test
-  '';
+  checkInputs = [ pytestrunner pytest hypothesis ];
+
+  # pytestrunner is only needed to run tests
+  patches = [ ./no-setup-requires-pytestrunner.patch ];
 
   meta = with stdenv.lib; {
     homepage = https://github.com/tobgu/pyrsistent/;

pkgs/development/python-modules/pyrsistent/no-setup-requires-pytestrunner.patch

@@ -0,0 +1,15 @@
+diff --git a/setup.py b/setup.py
+index 90a39a5..7bf444f 100644
+--- a/setup.py
++++ b/setup.py
+@@ -77,9 +77,8 @@ setup(
+         'Programming Language :: Python :: Implementation :: PyPy',
+     ],
+     test_suite='tests',
+-    tests_require=['pytest','hypothesis'],
++    tests_require=['pytest-runner', 'pytest','hypothesis'],
+     scripts=[],
+-    setup_requires=['pytest-runner'],
+     ext_modules=extensions,
+     cmdclass={'build_ext': custom_build_ext},
+     install_requires=['six'],