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/guppy3/default.nix

@@ -0,0 +1,32 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, pythonOlder
+, tkinter
+}:
+
+buildPythonPackage rec {
+  pname = "guppy3";
+  version = "3.1.2";
+  disabled = pythonOlder "3.6";
+
+  src = fetchFromGitHub {
+    owner = "zhuyifei1999";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-f7YpaZ85PU/CSsDwSm2IJ/x2ZxzHoMOVbdbzT1i8y/w=";
+  };
+
+  propagatedBuildInputs = [ tkinter ];
+
+  # Tests are starting a Tkinter GUI
+  doCheck = false;
+  pythonImportsCheck = [ "guppy" ];
+
+  meta = with lib; {
+    description = "Python Programming Environment & Heap analysis toolset";
+    homepage = "https://zhuyifei1999.github.io/guppy3/";
+    license = with licenses; [ mit ];
+    maintainers = with maintainers; [ fab ];
+  };
+}