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/pex/default.nix

@@ -0,0 +1,37 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, flit-core
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "pex";
+  version = "2.1.92";
+  format = "flit";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-LEHbS6rSKQl1APWYjNS8y1edtXDRqSuhfftcuM67K44=";
+  };
+
+  nativeBuildInputs = [
+    flit-core
+  ];
+
+  # A few more dependencies I don't want to handle right now...
+  doCheck = false;
+
+  pythonImportsCheck = [
+    "pex"
+  ];
+
+  meta = with lib; {
+    description = "Python library and tool for generating .pex (Python EXecutable) files";
+    homepage = "https://github.com/pantsbuild/pex";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ copumpkin ];
+  };
+}