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/development/ocaml-modules/lwt-watcher/default.nix

@@ -0,0 +1,30 @@
+{ lib
+, fetchFromGitLab
+, buildDunePackage
+, lwt
+}:
+
+buildDunePackage rec {
+  pname = "lwt-watcher";
+  version = "0.2";
+  src = fetchFromGitLab {
+    owner = "nomadic-labs";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-35Z73bSzEEgTabNH2cD9lRdDczsyIMZR2ktyKx4aN9k=";
+  };
+
+  useDune2 = true;
+
+  propagatedBuildInputs = [
+    lwt
+  ];
+
+  doCheck = true;
+
+  meta = {
+    description = "One-to-many broadcast in Lwt";
+    license = lib.licenses.mit;
+    maintainers = [ lib.maintainers.ulrikstrid ];
+  };
+}