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/ckan/default.nix

@@ -0,0 +1,35 @@
+{ lib, stdenv, fetchurl, makeWrapper, mono, gtk2, curl }:
+
+stdenv.mkDerivation rec {
+  pname = "ckan";
+  version = "1.30.4";
+
+  src = fetchurl {
+    url = "https://github.com/KSP-CKAN/CKAN/releases/download/v${version}/ckan.exe";
+    sha256 = "sha256-IgPqUEDpaIuGoaGoH2GCEzh3KxF3pkJC3VjTYXwSiQE=";
+  };
+
+  dontUnpack = true;
+
+  nativeBuildInputs = [ makeWrapper ];
+  buildInputs = [ mono ];
+
+  libraries = lib.makeLibraryPath [ gtk2 curl ];
+
+  buildPhase = "true";
+
+  installPhase = ''
+    install -m 644 -D $src $out/bin/ckan.exe
+    makeWrapper ${mono}/bin/mono $out/bin/ckan \
+      --add-flags $out/bin/ckan.exe \
+      --set LD_LIBRARY_PATH $libraries
+  '';
+
+  meta = with lib; {
+    description = "Mod manager for Kerbal Space Program";
+    homepage = "https://github.com/KSP-CKAN/CKAN";
+    license = licenses.mit;
+    maintainers = with maintainers; [ Baughn ymarkus ];
+    platforms = platforms.all;
+  };
+}