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/pyspice/default.nix

@@ -0,0 +1,53 @@
+{ lib, stdenv
+, buildPythonPackage
+, pythonOlder
+, fetchPypi
+, libngspice
+, numpy
+, ply
+, scipy
+, pyyaml
+, cffi
+, requests
+, matplotlib
+, setuptools
+}:
+
+buildPythonPackage rec {
+  pname = "PySpice";
+  version = "1.5";
+  disabled = pythonOlder "3.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "d28448accad98959e0f5932af8736e90a1f3f9ff965121c6881d24cdfca23d22";
+  };
+
+  propagatedBuildInputs = [
+    setuptools
+    requests
+    pyyaml
+    cffi
+    matplotlib
+    numpy
+    ply
+    scipy
+    libngspice
+  ];
+
+  doCheck = false;
+  pythonImportsCheck = [ "PySpice" ];
+
+  postPatch = ''
+    substituteInPlace PySpice/Spice/NgSpice/Shared.py --replace \
+        "ffi.dlopen(self.library_path)" \
+        "ffi.dlopen('${libngspice}/lib/libngspice${stdenv.hostPlatform.extensions.sharedLibrary}')"
+  '';
+
+  meta = with lib; {
+    description = "Simulate electronic circuit using Python and the Ngspice / Xyce simulators";
+    homepage = "https://github.com/FabriceSalvaire/PySpice";
+    license = licenses.gpl3Only;
+    maintainers = with maintainers; [ matthuszagh ];
+  };
+}