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/applications/accessibility/wvkbd/default.nix

@@ -0,0 +1,36 @@
+{ stdenv
+, lib
+, fetchFromGitHub
+, wayland-scanner
+, wayland
+, pango
+, glib
+, harfbuzz
+, cairo
+, pkg-config
+, libxkbcommon
+}:
+
+stdenv.mkDerivation rec {
+  pname = "wvkbd";
+  version = "0.7";
+
+  src = fetchFromGitHub {
+    owner = "jjsullivan5196";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-5UV2PMrLXtF3AxjfPxxwFRkgVef+Ap8nG1v795o0bWE=";
+  };
+
+  nativeBuildInputs = [ pkg-config ];
+  buildInputs = [ wayland-scanner wayland pango glib harfbuzz cairo libxkbcommon ];
+  installFlags = [ "PREFIX=$(out)" ];
+
+  meta = with lib; {
+    homepage = "https://github.com/jjsullivan5196/wvkbd";
+    description = "On-screen keyboard for wlroots";
+    maintainers = [ maintainers.elohmeier ];
+    platforms = platforms.linux;
+    license = licenses.gpl3Plus;
+  };
+}