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/index/default.nix

@@ -0,0 +1,48 @@
+{ lib, fetchurl, buildDunePackage
+, repr, ppx_repr, fmt, logs, mtime, stdlib-shims
+, cmdliner, progress, semaphore-compat, optint
+, alcotest, crowbar, re, lru
+}:
+
+buildDunePackage rec {
+  pname = "index";
+  version = "1.6.0";
+
+  src = fetchurl {
+    url = "https://github.com/mirage/index/releases/download/${version}/index-${version}.tbz";
+    sha256 = "sha256:150mcsh8vj2hapfnxbjmacanjy4avrv8yk1lyaxmqj3fpmn1y32y";
+  };
+
+  minimalOCamlVersion = "4.08";
+  useDune2 = true;
+
+  buildInputs = [
+    stdlib-shims
+  ];
+  propagatedBuildInputs = [
+    cmdliner
+    fmt
+    logs
+    mtime
+    ppx_repr
+    progress
+    repr
+    semaphore-compat
+    optint
+    lru
+  ];
+
+  checkInputs = [
+    alcotest
+    crowbar
+    re
+  ];
+  doCheck = true;
+
+  meta = with lib; {
+    description = "A platform-agnostic multi-level index";
+    homepage = "https://github.com/mirage/index";
+    license = licenses.mit;
+    maintainers = with maintainers; [ vbgl ];
+  };
+}