Python: fix outfall after setting `strictDeps = true;`

1 files changed, 4 insertions, 2 deletions

diff --git a/pkgs/development/python-modules/pytest-virtualenv/default.nix b/pkgs/development/python-modules/pytest-virtualenv/default.nix
index a3ecd4d62ae..ec644187056 100644
--- a/pkgs/development/python-modules/pytest-virtualenv/default.nix
+++ b/pkgs/development/python-modules/pytest-virtualenv/default.nix
@@ -1,5 +1,5 @@
 { stdenv, buildPythonPackage, fetchPypi
-, pytest, pytestcov, mock, cmdline, pytest-fixture-config, pytest-shutil }:
+, pytest_3, pytestcov, mock, cmdline, pytest-fixture-config, pytest-shutil }:
 
 buildPythonPackage rec {
   pname = "pytest-virtualenv";
@@ -10,10 +10,12 @@ buildPythonPackage rec {
     sha256 = "d281725d10848773cb2b495d1255dd0a42fc9179e34a274c22e1c35837721f19";
   };
 
-  buildInputs = [ pytest pytestcov mock cmdline ];
+  checkInputs = [ pytest_3 pytestcov mock cmdline ];
   propagatedBuildInputs = [ pytest-fixture-config pytest-shutil ];
   checkPhase = '' py.test tests/unit '';
 
+  nativeBuildInputs = [ pytest_3 ];
+
   meta = with stdenv.lib; {
     description = "Create a Python virtual environment in your test that cleans up on teardown. The fixture has utility methods to install packages and list what’s installed.";
     homepage = https://github.com/manahl/pytest-plugins;