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/numexpr/default.nix

@@ -0,0 +1,53 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, numpy
+, packaging
+, python
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "numexpr";
+  version = "2.8.1";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-zXeapE3ZhsTvEBY1GSOWArAnvgalJ5RmViB6zx9YETs=";
+  };
+
+  nativeBuildInputs = [
+    numpy
+  ];
+
+  propagatedBuildInputs = [
+    numpy
+    packaging
+  ];
+
+  preBuild = ''
+    # Remove existing site.cfg, use the one we built for numpy
+    ln -s ${numpy.cfg} site.cfg
+  '';
+
+  checkPhase = ''
+    runtest="$(pwd)/numexpr/tests/test_numexpr.py"
+    pushd "$out"
+    ${python.interpreter} "$runtest"
+    popd
+  '';
+
+  pythonImportsCheck = [
+    "numexpr"
+  ];
+
+  meta = with lib; {
+    description = "Fast numerical array expression evaluator for NumPy";
+    homepage = "https://github.com/pydata/numexpr";
+    license = licenses.mit;
+    maintainers = with maintainers; [ ];
+  };
+}