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/fe25519/default.nix

@@ -0,0 +1,50 @@
+{ lib
+, bitlist
+, buildPythonPackage
+, fetchPypi
+, fountains
+, parts
+, nose
+, pytestCheckHook
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "fe25519";
+  version = "1.2.0";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-Hzdt8932WonJAaQPtL346JFPqxFXkNW4XQvbQlSoJJE=";
+  };
+
+  propagatedBuildInputs = [
+    bitlist
+    fountains
+    parts
+  ];
+
+  checkInputs = [
+    nose
+    pytestCheckHook
+  ];
+
+  postPatch = ''
+    substituteInPlace setup.cfg \
+      --replace " --cov=fe25519 --cov-report term-missing" ""
+  '';
+
+  pythonImportsCheck = [
+    "fe25519"
+  ];
+
+  meta = with lib; {
+    description = "Python field operations for Curve25519's prime";
+    homepage = "https://github.com/BjoernMHaase/fe25519";
+    license = with licenses; [ cc0 ];
+    maintainers = with maintainers; [ fab ];
+  };
+}