$NetBSD: patch-opam,v 1.1 2019/08/24 11:07:34 jaapb Exp $

Remove dependency on deriving (patch from upstream)
--- opam.orig	2019-02-08 11:31:12.000000000 +0000
+++ opam
@@ -13,7 +13,6 @@ build: [make]
 depends: [
   "ocaml" {>= "4.06.1"}
   "ocamlfind"
-  "deriving" {>= "0.6"}
   "ppx_deriving"
   "ppx_tools" {>= "0.99.3"}
   "js_of_ocaml" {>= "3.3"}
