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/pycm/default.nix

@@ -0,0 +1,60 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, matplotlib
+, numpy
+, pytestCheckHook
+, pythonOlder
+, seaborn
+}:
+
+buildPythonPackage rec {
+  pname = "pycm";
+  version = "3.5";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.5";
+
+  src = fetchFromGitHub {
+    owner = "sepandhaghighi";
+    repo = pname;
+    rev = "refs/tags/v${version}";
+    sha256 = "sha256-iDt1voNcn59bZN/AyKrWFBIymTT618o91kz2AV42hWs=";
+  };
+
+  propagatedBuildInputs = [
+    matplotlib
+    numpy
+    seaborn
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  postPatch = ''
+    # Remove a trivial dependency on the author's `art` Python ASCII art library
+    rm pycm/__main__.py
+    # Also depends on python3Packages.notebook
+    rm Otherfiles/notebook_check.py
+    substituteInPlace setup.py \
+      --replace '=get_requires()' '=[]'
+  '';
+
+  disabledTests = [
+    # Output formatting error
+    "pycm.pycm_compare.Compare"
+    "plot_test"
+  ];
+
+  pythonImportsCheck = [
+    "pycm"
+  ];
+
+  meta = with lib; {
+    description = "Multiclass confusion matrix library";
+    homepage = "https://pycm.ir";
+    license = licenses.mit;
+    maintainers = with maintainers; [ bcdarwin ];
+  };
+}