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/mpv/default.nix

@@ -0,0 +1,33 @@
+{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python, isPy27
+, mpv
+}:
+
+buildPythonPackage rec {
+  pname = "mpv";
+  version = "0.5.2";
+  disabled = isPy27;
+
+  src = fetchFromGitHub {
+    owner = "jaseg";
+    repo = "python-mpv";
+    rev = "v${version}";
+    sha256 = "0ffskpynhl1252h6a05087lvpjgn1cn2z3caiv3i666dn1n79fjd";
+  };
+
+  buildInputs = [ mpv ];
+
+  postPatch = ''
+    substituteInPlace mpv.py \
+      --replace "sofile = ctypes.util.find_library('mpv')" \
+                'sofile = "${mpv}/lib/libmpv${stdenv.targetPlatform.extensions.sharedLibrary}"'
+  '';
+
+  # tests impure, will error if it can't load libmpv.so
+  checkPhase = "${python.interpreter} -c 'import mpv'";
+
+  meta = with lib; {
+    description = "A python interface to the mpv media player";
+    homepage = "https://github.com/jaseg/python-mpv";
+    license = licenses.agpl3Plus;
+  };
+}