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/imageio-ffmpeg/default.nix

@@ -0,0 +1,48 @@
+{ lib
+, buildPythonPackage
+, isPy3k
+, fetchPypi
+, substituteAll
+, ffmpeg_4
+, python
+}:
+
+buildPythonPackage rec {
+  pname = "imageio-ffmpeg";
+  version = "0.4.5";
+
+  disabled = !isPy3k;
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "f2ea4245a2adad25dedf98d343159579167e549ac8c4691cef5eff980e20c139";
+  };
+
+  patches = [
+    (substituteAll {
+      src = ./ffmpeg-path.patch;
+      ffmpeg = "${ffmpeg_4}/bin/ffmpeg";
+    })
+  ];
+
+  checkPhase = ''
+    runHook preCheck
+
+    ${python.interpreter} << EOF
+    from imageio_ffmpeg import get_ffmpeg_version
+    assert get_ffmpeg_version() == '${ffmpeg_4.version}'
+    EOF
+
+    runHook postCheck
+  '';
+
+  pythonImportsCheck = [ "imageio_ffmpeg" ];
+
+  meta = with lib; {
+    description = "FFMPEG wrapper for Python";
+    homepage = "https://github.com/imageio/imageio-ffmpeg";
+    license = licenses.bsd2;
+    maintainers = [ maintainers.pmiddend ];
+  };
+
+}