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/gradient-utils/default.nix

@@ -0,0 +1,70 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, hyperopt
+, mock
+, numpy
+, poetry-core
+, prometheus-client
+, pytestCheckHook
+, pythonOlder
+, requests
+}:
+
+buildPythonPackage rec {
+  pname = "gradient-utils";
+  version = "0.5.0";
+  format = "pyproject";
+
+  disabled = pythonOlder "3.6";
+
+  src = fetchFromGitHub {
+    owner = "Paperspace";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "19plkgwwfs6298vjplgsvhirixi3jbngq5y07x9c0fjxk39fa2dk";
+  };
+
+  nativeBuildInputs = [
+    poetry-core
+  ];
+
+  propagatedBuildInputs = [
+    hyperopt
+    prometheus-client
+    numpy
+  ];
+
+  checkInputs = [
+    mock
+    requests
+    pytestCheckHook
+  ];
+
+  postPatch = ''
+    substituteInPlace pyproject.toml \
+      --replace 'wheel = "^0.35.1"' 'wheel = "*"' \
+      --replace 'prometheus-client = ">=0.8,<0.10"' 'prometheus-client = "*"'
+  '';
+
+  preCheck = ''
+    export HOSTNAME=myhost-experimentId
+  '';
+
+  disabledTestPaths = [
+    # Requires a working Prometheus push gateway
+    "tests/integration/test_metrics.py"
+  ];
+
+  pythonImportsCheck = [
+    "gradient_utils"
+  ];
+
+  meta = with lib; {
+    description = "Python utils and helpers library for Gradient";
+    homepage = "https://github.com/Paperspace/gradient-utils";
+    license = licenses.mit;
+    platforms = platforms.unix;
+    maintainers = with maintainers; [ freezeboy ];
+  };
+}