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/flitter/default.nix

@@ -0,0 +1,55 @@
+{ lib
+, stdenv
+, ocamlPackages
+, fetchFromGitHub
+, makeWrapper
+, python3
+}:
+
+ocamlPackages.buildDunePackage rec {
+  pname = "flitter";
+  # request to tag releases: https://github.com/alexozer/flitter/issues/34
+  version = "unstable-2020-10-05";
+
+  useDune2 = true;
+
+  src = fetchFromGitHub {
+    owner = "alexozer";
+    repo = "flitter";
+    rev = "666c5483bc93efa6d01e0b7a927461269f8e14de";
+    sha256 = "1k3m7bjq5yrrq7vhnbdykni65dsqhq6knnv9wvwq3svb3n07z4w3";
+  };
+
+  # https://github.com/alexozer/flitter/issues/28
+  postPatch = ''
+    for f in src/colors.ml src/duration.ml src/event_loop.ml src/splits.ml; do
+      substituteInPlace "$f" \
+        --replace 'Unix.gettimeofday' 'Caml_unix.gettimeofday'
+    done
+  '';
+
+  nativeBuildInputs = [
+    makeWrapper
+  ];
+
+  buildInputs = with ocamlPackages; [
+    core
+    lwt_ppx
+    sexp_pretty
+    color
+    notty
+  ];
+
+  postInstall = ''
+    wrapProgram $out/bin/flitter \
+      --prefix PATH : "${python3.withPackages (pp: [ pp.pynput ])}/bin"
+  '';
+
+  meta = with lib; {
+    description = "A Livesplit-inspired speedrunning split timer for Linux/macOS terminal";
+    license = licenses.mit;
+    maintainers = with maintainers; [ fgaz ];
+    homepage = "https://github.com/alexozer/flitter";
+    platforms = platforms.unix;
+  };
+}