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/repr/default.nix

@@ -0,0 +1,30 @@
+{ lib, buildDunePackage, fetchurl, base64, either, fmt, jsonm, uutf, optint }:
+
+buildDunePackage rec {
+  pname = "repr";
+  version = "0.5.0";
+
+  src = fetchurl {
+    url = "https://github.com/mirage/${pname}/releases/download/${version}/${pname}-fuzz-${version}.tbz";
+    sha256 = "1y9qnbaxcyxz7bzkkq5lwjrv715mvp2vphzcrd8vbvjhp7df3l1f";
+  };
+
+  minimumOCamlVersion = "4.08";
+  useDune2 = true;
+
+  propagatedBuildInputs = [
+    base64
+    either
+    fmt
+    jsonm
+    uutf
+    optint
+  ];
+
+  meta = with lib; {
+    description = "Dynamic type representations. Provides no stability guarantee";
+    homepage = "https://github.com/mirage/repr";
+    license = licenses.isc;
+    maintainers = with maintainers; [ sternenseemann ];
+  };
+}

pkgs/development/ocaml-modules/repr/ppx.nix

@@ -0,0 +1,23 @@
+{ lib, buildDunePackage, ppx_deriving, ppxlib, repr, alcotest, hex }:
+
+buildDunePackage {
+  pname = "ppx_repr";
+
+  inherit (repr) src version useDune2;
+
+  propagatedBuildInputs = [
+    ppx_deriving
+    ppxlib
+    repr
+  ];
+
+  doCheck = false; # tests fail with ppxlib >= 0.23.0
+  checkInputs = [
+    alcotest
+    hex
+  ];
+
+  meta = repr.meta // {
+    description = "PPX deriver for type representations";
+  };
+}