From 9ce157afc89e8a146d1cb5581db5a6c2bd1a51cf Mon Sep 17 00:00:00 2001
From: Randy Eckenrode <randy@largeandhighquality.com>
Date: Wed, 1 Jun 2022 18:30:17 -0400
Subject: [PATCH] mono: fix broken mono4 build on Darwin

---
 pkgs/development/compilers/mono/4.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/compilers/mono/4.nix b/pkgs/development/compilers/mono/4.nix
index 02c6177c9df..0b283d4f177 100644
--- a/pkgs/development/compilers/mono/4.nix
+++ b/pkgs/development/compilers/mono/4.nix
@@ -1,9 +1,9 @@
-{ callPackage, Foundation, libobjc }:
+{ callPackage, Foundation, libobjc, stdenv, lib }:
 
 callPackage ./generic.nix ({
   inherit Foundation libobjc;
   version = "4.8.1.0";
   sha256 = "1vyvp2g28ihcgxgxr8nhzyzdmzicsh5djzk8dk1hj5p5f2k3ijqq";
   enableParallelBuilding = false; # #32386, https://hydra.nixos.org/build/65600645
-  extraPatches = [ ./mono4-glibc.patch ];
+  extraPatches = lib.optionals stdenv.isLinux [ ./mono4-glibc.patch ];
 })