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/unpaddedbase64/default.nix

@@ -0,0 +1,29 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, poetry-core
+}:
+
+buildPythonPackage rec {
+  pname = "unpaddedbase64";
+  version = "2.1.0";
+  format = "pyproject";
+
+  src = fetchFromGitHub {
+    owner = "matrix-org";
+    repo = "python-${pname}";
+    rev = "refs/tags/v${version}";
+    sha256 = "1n6har8pxv0mqb96lanzihp1xf76aa17jw3977drb1fgz947pnmz";
+  };
+
+  nativeBuildInputs = [
+    poetry-core
+  ];
+
+  meta = with lib; {
+    homepage = "https://github.com/matrix-org/python-unpaddedbase64";
+    description = "Unpadded Base64";
+    license = licenses.asl20;
+  };
+
+}