From 6f930f18f041ea291e2878229e747c5eaded49d0 Mon Sep 17 00:00:00 2001
From: FliegendeWurst <2012gdwu+github@posteo.de>
Date: Wed, 2 Feb 2022 12:14:36 +0100
Subject: [PATCH] ocamlPackages.camlp4: disable parallel build

---
 pkgs/development/tools/ocaml/camlp4/default.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/development/tools/ocaml/camlp4/default.nix b/pkgs/development/tools/ocaml/camlp4/default.nix
index acf1730af1bc..97a769628fe0 100644
--- a/pkgs/development/tools/ocaml/camlp4/default.nix
+++ b/pkgs/development/tools/ocaml/camlp4/default.nix
@@ -55,6 +55,9 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ which ocaml ocamlbuild ];
 
+  # build fails otherwise
+  enableParallelBuilding = false;
+
   dontAddPrefix = true;
 
   preConfigure = ''