From 4cf775aee93760b1107a1aa87dbd2a5883fa9e64 Mon Sep 17 00:00:00 2001
From: Vincent Laporte <Vincent.Laporte@gmail.com>
Date: Thu, 2 Apr 2020 06:55:38 +0200
Subject: [PATCH] =?UTF-8?q?ocamlPackages.cppo:=201.6.5=20=E2=86=92=201.6.6?=
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---
 pkgs/development/tools/ocaml/cppo/default.nix | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/tools/ocaml/cppo/default.nix b/pkgs/development/tools/ocaml/cppo/default.nix
index d6327010e30e..63c169f045f9 100644
--- a/pkgs/development/tools/ocaml/cppo/default.nix
+++ b/pkgs/development/tools/ocaml/cppo/default.nix
@@ -6,9 +6,14 @@ in
 assert stdenv.lib.versionAtLeast ocaml.version "3.12";
 
 let param =
-  if stdenv.lib.versionAtLeast ocaml.version "4.02" then {
+  if stdenv.lib.versionAtLeast ocaml.version "4.02" then
+   (if stdenv.lib.versionAtLeast ocaml.version "4.03" then {
+    version = "1.6.6";
+    sha256 = "1smcc0l6fh2n0y6bp96c69j5nw755jja99w0b206wx3yb2m4w2hs";
+   } else {
     version = "1.6.5";
     sha256 = "03c0amszy28shinvz61hm340jz446zz5763a1pdqlza36kwcj0p0";
+   }) // {
     buildInputs = [ dune ];
     extra = {
       inherit (dune) installPhase;