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/libraries/box2d/default.nix

@@ -0,0 +1,37 @@
+{ lib, stdenv, fetchFromGitHub, cmake, libGLU, libGL, freeglut, libX11, xorgproto
+, libXi, pkg-config }:
+
+stdenv.mkDerivation rec {
+  pname = "box2d";
+  version = "2.3.1";
+
+  src = fetchFromGitHub {
+    owner = "erincatto";
+    repo = "box2d";
+    rev = "v${version}";
+    sha256 = "sha256-Z2J17YMzQNZqABIa5eyJDT7BWfXveymzs+DWsrklPIs=";
+  };
+
+  nativeBuildInputs = [ cmake pkg-config ];
+  buildInputs = [ libGLU libGL freeglut libX11 xorgproto libXi ];
+
+  cmakeFlags = [
+    "-DBOX2D_INSTALL=ON"
+    "-DBOX2D_BUILD_SHARED=ON"
+    "-DBOX2D_BUILD_EXAMPLES=OFF"
+  ];
+
+  prePatch = ''
+    cd Box2D
+    substituteInPlace Box2D/Common/b2Settings.h \
+      --replace 'b2_maxPolygonVertices	8' 'b2_maxPolygonVertices	15'
+  '';
+
+  meta = with lib; {
+    description = "2D physics engine";
+    homepage = "https://box2d.org/";
+    maintainers = [ maintainers.raskin ];
+    platforms = platforms.unix;
+    license = licenses.zlib;
+  };
+}