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/ipykernel/default.nix

@@ -0,0 +1,52 @@
+{ lib
+, buildPythonPackage
+, callPackage
+, fetchPypi
+, pythonOlder
+, ipython
+, jupyter-client
+, packaging
+, psutil
+, tornado
+, traitlets
+}:
+
+buildPythonPackage rec {
+  pname = "ipykernel";
+  version = "6.12.1";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-CGj1VhcpreREAR+Mp9NQLcnyf39E4g8dX+5+Hytxg6E=";
+  };
+
+  # debugpy is optional, see https://github.com/ipython/ipykernel/pull/767
+  postPatch = ''
+    sed -i "/debugpy/d" setup.py
+  '';
+
+  propagatedBuildInputs = [
+    ipython
+    jupyter-client
+    packaging
+    psutil
+    tornado
+    traitlets
+  ];
+
+  # check in passthru.tests.pytest to escape infinite recursion with ipyparallel
+  doCheck = false;
+
+  passthru.tests = {
+    pytest = callPackage ./tests.nix { };
+  };
+
+  meta = {
+    description = "IPython Kernel for Jupyter";
+    homepage = "http://ipython.org/";
+    license = lib.licenses.bsd3;
+    maintainers = with lib.maintainers; [ fridh ];
+  };
+}