From f3fca40fd1088d8bd3fe01772ae96148a5339dbc Mon Sep 17 00:00:00 2001
From: Vincent Laporte <Vincent.Laporte@gmail.com>
Date: Mon, 6 Nov 2023 06:10:32 +0100
Subject: [PATCH] =?UTF-8?q?ocamlPackages.fontconfig:=20fix=20build=20with?=
 =?UTF-8?q?=20OCaml=20=E2=89=A5=205.0?=
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---
 pkgs/development/ocaml-modules/fontconfig/default.nix | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/ocaml-modules/fontconfig/default.nix b/pkgs/development/ocaml-modules/fontconfig/default.nix
index 2eca9a4644b5..5d7e5f59b8bd 100644
--- a/pkgs/development/ocaml-modules/fontconfig/default.nix
+++ b/pkgs/development/ocaml-modules/fontconfig/default.nix
@@ -1,7 +1,7 @@
 { stdenv, lib, fetchFromGitHub, pkg-config, fontconfig, ocaml }:
 
 stdenv.mkDerivation {
-  pname = "ocaml-fontconfig";
+  pname = "ocaml${ocaml.version}-fontconfig";
   version = "unstable-2013-11-03";
 
   src = fetchFromGitHub {
@@ -11,6 +11,12 @@ stdenv.mkDerivation {
     sha256 = "1fw6bzydmnyh2g4x35mcbg0hypnxqhynivk4nakcsx7prr8zr3yh";
   };
 
+  postPatch = lib.optionalString (lib.versionAtLeast ocaml.version "4.03") ''
+    substituteInPlace extract_consts.ml \
+      --replace String.lowercase String.lowercase_ascii \
+      --replace String.capitalize String.capitalize_ascii
+  '';
+
   nativeBuildInputs = [ pkg-config ocaml ];
   buildInputs = [ fontconfig ];
 
@@ -24,7 +30,7 @@ stdenv.mkDerivation {
   meta = {
     description = "Fontconfig bindings for OCaml";
     license = lib.licenses.gpl2Plus;
-    platforms = ocaml.meta.platforms or [ ];
+    platforms = ocaml.meta.platforms;
     maintainers = with lib.maintainers; [ vbgl ];
   };
 }