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/tools/misc/urn-timer/default.nix

@@ -0,0 +1,66 @@
+{ lib, stdenv
+, fetchFromGitHub
+, fetchpatch
+, unstableGitUpdater
+, xxd
+, pkg-config
+, imagemagick
+, wrapGAppsHook
+, gtk3
+, jansson
+}:
+
+stdenv.mkDerivation {
+  pname = "urn-timer";
+  version = "unstable-2017-08-20";
+
+  src = fetchFromGitHub {
+    owner = "3snowp7im";
+    repo = "urn";
+    rev = "246a7a642fa7a673166c1bd281585d0fc22e75b2";
+    sha256 = "0bniwf3nhsqapsss9m9y9ylh38v6v7q45999wa1qcsddpa72k0i0";
+    fetchSubmodules = true;
+  };
+
+  patches = [
+    # https://github.com/3snowp7im/urn/pull/50
+    (fetchpatch {
+      name = "stop-hardcoding-prefix";
+      url = "https://github.com/3snowp7im/urn/commit/6054ee62dcd6095e31e8fb2a229155dbbcb39f68.patch";
+      sha256 = "1xdkylbqlqjwqx4pb9v1snf81ag7b6q8vybirz3ibsv6iy79v9pk";
+    })
+    # https://github.com/3snowp7im/urn/pull/53
+    (fetchpatch {
+      name = "create-installation-directories";
+      url = "https://github.com/3snowp7im/urn/commit/fb032851b9c5bebb5066d306f5366f0be34f0797.patch";
+      sha256 = "0jjhcz4n8bm3hl56rvjzkvxr6imc05qlyavzjrlafa19hf036g4a";
+    })
+  ];
+
+  postPatch = ''substituteInPlace GNUmakefile --replace 'rsync -a --exclude=".*"' 'cp -r' '';
+
+  nativeBuildInputs = [
+    xxd
+    pkg-config
+    imagemagick
+    wrapGAppsHook
+  ];
+
+  buildInputs = [
+    gtk3
+    jansson
+  ];
+
+  makeFlags = [ "PREFIX=$(out)" ];
+
+  passthru.updateScript = unstableGitUpdater {
+    url = "https://github.com/3snowp7im/urn.git";
+  };
+
+  meta = with lib; {
+    homepage = "https://github.com/3snowp7im/urn";
+    description = "Split tracker / timer for speedrunning with GTK+ frontend";
+    license = licenses.gpl3Plus;
+    maintainers = with maintainers; [ fgaz ];
+  };
+}