pythonPackages.pytestcache: Move to own file

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

@@ -0,0 +1,28 @@
+{ stdenv, buildPythonPackage, fetchPypi
+, pytest, execnet }:
+
+buildPythonPackage rec {
+  pname = "pytest-cache";
+  version = "1.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1a873fihw4rhshc722j4h6j7g3nj7xpgsna9hhg3zn6ksknnhx5y";
+  };
+
+  buildInputs = [ pytest ];
+  propagatedBuildInputs = [ execnet ];
+
+  checkPhase = ''
+    py.test
+  '';
+
+  # Too many failing tests. Are they maintained?
+  doCheck = false;
+
+  meta = with stdenv.lib; {
+    license = licenses.mit;
+    homepage = https://pypi.python.org/pypi/pytest-cache/;
+    description = "pytest plugin with mechanisms for caching across test runs";
+  };
+}