python3Packages.pytest_xdist_2: init at 2.0.0, pin xdist_1

pkgs/development/python-modules/pytest-xdist/2.nix

@@ -0,0 +1,31 @@
+{ stdenv, fetchPypi, buildPythonPackage, execnet, pytest_6
+, setuptools_scm, pytest-forked, filelock, psutil, six, isPy3k }:
+
+buildPythonPackage rec {
+  pname = "pytest-xdist";
+  version = "2.0.0";
+  disabled = !isPy3k;
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "3217b1f40290570bf27b1f82714fc4ed44c3260ba9b2f6cde0372378fc707ad3";
+  };
+
+  nativeBuildInputs = [ setuptools_scm pytest_6 ];
+  checkInputs = [ pytest_6 filelock ];
+  propagatedBuildInputs = [ execnet pytest-forked psutil six ];
+
+  # pytest6 doesn't allow for new lines
+  checkPhase = ''
+    # Excluded tests access file system
+    export HOME=$TMPDIR
+    pytest -n $NIX_BUILD_CORES -k "not (distribution_rsyncdirs_example or rsync)"
+  '';
+
+  meta = with stdenv.lib; {
+    description = "py.test xdist plugin for distributed testing and loop-on-failing modes";
+    homepage = "https://github.com/pytest-dev/pytest-xdist";
+    license = licenses.mit;
+    maintainers = with maintainers; [ dotlambda ];
+  };
+}

pkgs/development/python-modules/pytest-xdist/default.nix

@@ -3,11 +3,11 @@
 
 buildPythonPackage rec {
   pname = "pytest-xdist";
-  version = "2.0.0";
+  version = "1.34.0";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "3217b1f40290570bf27b1f82714fc4ed44c3260ba9b2f6cde0372378fc707ad3";
+    sha256 = "1vh4ps32lp5ignch5adbl3pgchvigdfmrl6qpmhxih54wa1qw3il";
   };
 
   nativeBuildInputs = [ setuptools_scm pytest ];

pkgs/top-level/python-packages.nix

@@ -2756,7 +2756,11 @@ in {
 
   pytest-virtualenv = callPackage ../development/python-modules/pytest-virtualenv { };
 
-  pytest_xdist = callPackage ../development/python-modules/pytest-xdist { };
+  pytest_xdist = self.pytest_xdist_1;
+
+  pytest_xdist_1 = callPackage ../development/python-modules/pytest-xdist { };
+
+  pytest_xdist_2 = callPackage ../development/python-modules/pytest-xdist/2.nix { };
 
   pytest-localserver = callPackage ../development/python-modules/pytest-localserver { };