From 0900872b02ca8e250a16642d445026a846de9f6a Mon Sep 17 00:00:00 2001
From: Vincent Laporte <Vincent.Laporte@gmail.com>
Date: Thu, 14 May 2020 08:29:04 +0200
Subject: [PATCH] ocamlPackages.batteries: fix for OCaml 4.10

---
 pkgs/development/ocaml-modules/batteries/default.nix | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/ocaml-modules/batteries/default.nix b/pkgs/development/ocaml-modules/batteries/default.nix
index 2ed697d42df47c..3032df7b8fd554 100644
--- a/pkgs/development/ocaml-modules/batteries/default.nix
+++ b/pkgs/development/ocaml-modules/batteries/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, ocaml, findlib, ocamlbuild, qtest, num }:
+{ stdenv, fetchurl, fetchpatch, ocaml, findlib, ocamlbuild, qtest, num }:
 
 let version = "3.0.0"; in
 
@@ -10,6 +10,12 @@ stdenv.mkDerivation {
     sha256 = "0d833amm4p0pczgl7wriv99f3r5r6345p5gi9d97sm0hqx27vzwi";
   };
 
+  # Fixes tests with OCaml 4.10
+  patches = [(fetchpatch {
+    url = "https://github.com/ocaml-batteries-team/batteries-included/commit/6d8d67f9fb48181be3d527b32df15899b00cd5dd.patch";
+    sha256 = "0msk8c5bjm6gm011i75b1rza332i1r4adj58qzli6gyjlvfj1hx4";
+  })];
+
   buildInputs = [ ocaml findlib ocamlbuild qtest ];
   propagatedBuildInputs = [ num ];