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/opam-repository/default.nix

@@ -0,0 +1,27 @@
+{ lib, buildDunePackage, unzip, opam-format, curl }:
+
+buildDunePackage rec {
+  pname = "opam-repository";
+
+  minimumOCamlVersion = "4.02";
+
+  useDune2 = true;
+
+  inherit (opam-format) src version;
+
+  patches = [ ./download-tool.patch ];
+  postPatch = ''
+    substituteInPlace src/repository/opamRepositoryConfig.ml \
+      --replace "SUBSTITUTE_NIXOS_CURL_PATH" "\"${curl}/bin/curl\""
+  '';
+
+  strictDeps = true;
+
+  nativeBuildInputs = [ unzip curl ];
+  propagatedBuildInputs = [ opam-format ];
+
+  meta = opam-format.meta // {
+    description = "OPAM repository and remote sources handling, including curl/wget, rsync, git, mercurial, darcs backends";
+    maintainers = with lib.maintainers; [ sternenseemann ];
+  };
+}