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/conduit/async.nix

@@ -0,0 +1,30 @@
+{ lib, buildDunePackage, async, async_ssl, ppx_sexp_conv, ppx_here, uri, conduit
+, core, ipaddr, ipaddr-sexp, sexplib
+}:
+
+buildDunePackage {
+  pname = "conduit-async";
+  inherit (conduit)
+    version
+    src
+    minimumOCamlVersion
+    useDune2
+    ;
+
+  buildInputs = [ ppx_sexp_conv ppx_here ];
+
+  propagatedBuildInputs = [
+    async
+    async_ssl
+    conduit
+    uri
+    ipaddr
+    ipaddr-sexp
+    core
+    sexplib
+  ];
+
+  meta = conduit.meta // {
+    description = "A network connection establishment library for Async";
+  };
+}