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/libyaml-cpp/0.3.0.nix

@@ -0,0 +1,32 @@
+{ lib, stdenv, fetchFromGitHub, cmake }:
+
+stdenv.mkDerivation rec {
+  pname = "libyaml-cpp";
+  version = "0.3.0";
+
+  src = fetchFromGitHub {
+    owner = "jbeder";
+    repo = "yaml-cpp";
+    rev = "release-${version}";
+    sha256 = "sha256-pmgcULTXhl83+Wc8ZsGebnJ1t0XybHhUEJxDnEZE5x8=";
+  };
+
+  # implement https://github.com/jbeder/yaml-cpp/commit/52a1378e48e15d42a0b755af7146394c6eff998c
+  postPatch = ''
+    substituteInPlace CMakeLists.txt \
+      --replace 'option(YAML_BUILD_SHARED_LIBS "Build Shared Libraries" OFF)' \
+                'option(YAML_BUILD_SHARED_LIBS "Build yaml-cpp shared library" ''${BUILD_SHARED_LIBS})'
+  '';
+
+  nativeBuildInputs = [ cmake ];
+
+  cmakeFlags = [ "-DBUILD_SHARED_LIBS=ON" "-DYAML_CPP_BUILD_TESTS=OFF" ];
+
+  meta = with lib; {
+    inherit (src.meta) homepage;
+    description = "A YAML parser and emitter for C++";
+    license = licenses.mit;
+    platforms = platforms.unix;
+    maintainers = with maintainers; [ ];
+  };
+}