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/diofant/default.nix

@@ -0,0 +1,48 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, gmpy2
+, isort
+, mpmath
+, numpy
+, pythonOlder
+, scipy
+, setuptools-scm
+}:
+
+buildPythonPackage rec {
+  pname = "diofant";
+  version = "0.13.0";
+  disabled = pythonOlder "3.9";
+  format = "pyproject";
+
+  src = fetchPypi {
+    inherit version;
+    pname = "Diofant";
+    sha256 = "bac9e086a7156b20f18e3291d6db34e305338039a3c782c585302d377b74dd3c";
+  };
+
+  nativeBuildInputs = [
+    isort
+    setuptools-scm
+  ];
+
+  propagatedBuildInputs = [
+    gmpy2
+    mpmath
+    numpy
+    scipy
+  ];
+
+  # tests take ~1h
+  doCheck = false;
+
+  pythonImportsCheck = [ "diofant" ];
+
+  meta = with lib; {
+    description = "A Python CAS library";
+    homepage = "https://diofant.readthedocs.io/";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ suhr ];
+  };
+}