uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

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

@@ -0,0 +1,58 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pythonOlder
+, setuptools-scm
+, pytestCheckHook
+, filelock
+, execnet
+, pytest
+, pytest-forked
+, psutil
+, pexpect
+}:
+
+buildPythonPackage rec {
+  pname = "pytest-xdist";
+  version = "2.5.0";
+  disabled = pythonOlder "3.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-RYDeyj/wTdsqxT66Oddstd1e3qwFDLb7x2iw3XErTt8=";
+  };
+
+  nativeBuildInputs = [ setuptools-scm ];
+  buildInputs = [
+    pytest
+  ];
+  checkInputs = [ pytestCheckHook filelock pexpect ];
+  propagatedBuildInputs = [ execnet pytest-forked psutil ];
+
+  pytestFlagsArray = [
+    # pytest can already use xdist at this point
+    "--numprocesses=$NIX_BUILD_CORES"
+    "--forked"
+  ];
+
+  # access file system
+  disabledTests = [
+    "test_distribution_rsyncdirs_example"
+    "test_rsync_popen_with_path"
+    "test_popen_rsync_subdir"
+    "test_rsync_report"
+    "test_init_rsync_roots"
+    "test_rsyncignore"
+    # flakey
+    "test_internal_errors_propagate_to_controller"
+  ];
+
+  setupHook = ./setup-hook.sh;
+
+  meta = with lib; {
+    description = "Pytest 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/setup-hook.sh

@@ -0,0 +1,18 @@
+pytestXdistHook() {
+    pytestFlagsArray+=(
+        "--numprocesses=$NIX_BUILD_CORES"
+        "--forked"
+    )
+}
+
+# the flags should be added before pytestCheckHook runs so
+# until we have dependency mechanism in generic builder, we need to use this ugly hack.
+
+if [ -z "${dontUsePytestXdist-}" ] && [ -z "${dontUsePytestCheck-}" ]; then
+    if [[ " ${preDistPhases:-} " =~ " pytestCheckPhase " ]]; then
+        preDistPhases+=" "
+        preDistPhases="${preDistPhases/ pytestCheckPhase / pytestXdistHook pytestCheckPhase }"
+    else
+        preDistPhases+=" pytestXdistHook"
+    fi
+fi