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/games/dxx-rebirth/assets.nix

@@ -0,0 +1,55 @@
+{ lib, stdenv, requireFile, gogUnpackHook }:
+
+let
+  generic = ver: source: let
+    pname = "descent${toString ver}";
+  in stdenv.mkDerivation rec {
+    name = "${pname}-assets-${version}";
+    version = "2.0.0.7";
+
+    src = requireFile rec {
+      name = "setup_descent12_${version}.exe";
+      sha256 = "1r1drbfda6czg21f9qqiiwgnkpszxgmcn5bafp5ljddh34swkn3f";
+      message = ''
+        While the Descent ${toString ver} game engine is free, the game assets are not.
+
+        Please purchase the game on gog.com and download the Windows installer.
+
+        Once you have downloaded the file, please use the following command and re-run the
+        installation:
+
+        nix-prefetch-url file://\$PWD/${name}
+      '';
+    };
+
+    nativeBuildInputs = [ gogUnpackHook ];
+
+    dontBuild = true;
+    dontFixup = true;
+
+    installPhase = ''
+      runHook preInstall
+
+      mkdir -p $out/share/{games/${pname},doc/${pname}/examples}
+      pushd "app/${source}"
+      mv dosbox*.conf $out/share/doc/${pname}/examples
+      mv *.txt *.pdf  $out/share/doc/${pname}
+      cp -r * $out/share/games/descent${toString ver}
+      popd
+
+      runHook postInstall
+    '';
+
+    meta = with lib; {
+      description = "Descent ${toString ver} assets from GOG";
+      homepage    = "https://www.dxx-rebirth.com/";
+      license     = licenses.unfree;
+      maintainers = with maintainers; [ peterhoeg ];
+      hydraPlatforms = [];
+    };
+  };
+
+in {
+  descent1-assets = generic 1 "descent";
+  descent2-assets = generic 2 "descent 2";
+}