From a5ffa79932244d21f7f7445b0ce35c2f0d37c5e8 Mon Sep 17 00:00:00 2001
From: Et7f3 <cadeaudeelie@gmail.com>
Date: Tue, 24 Jan 2023 23:41:28 +0100
Subject: [PATCH] ocamlPackages.gd4o: fix build on darwin and probably on linux

---
 pkgs/development/ocaml-modules/gd4o/default.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/development/ocaml-modules/gd4o/default.nix b/pkgs/development/ocaml-modules/gd4o/default.nix
index 19a1b42f06bd..9923edc2e8db 100644
--- a/pkgs/development/ocaml-modules/gd4o/default.nix
+++ b/pkgs/development/ocaml-modules/gd4o/default.nix
@@ -12,6 +12,9 @@ stdenv.mkDerivation rec {
   buildInputs = [ ocaml findlib libjpeg libpng ];
   propagatedBuildInputs = [ gd zlib freetype ];
 
+  prePatch = ''
+    substituteInPlace Makefile --replace gcc cc
+  '';
 
   preInstall = ''
     mkdir -p $OCAMLFIND_DESTDIR/stublibs