From da41b78db8ed662e6cb5fd33800aa6c8f3a6530f Mon Sep 17 00:00:00 2001
From: Jonathan Ringer <jonringer117@gmail.com>
Date: Fri, 27 Mar 2020 13:48:22 -0700
Subject: [PATCH] acme: fix darwin build

---
 pkgs/development/compilers/acme/default.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pkgs/development/compilers/acme/default.nix b/pkgs/development/compilers/acme/default.nix
index 2aca7478d7b..c5a997ad75b 100644
--- a/pkgs/development/compilers/acme/default.nix
+++ b/pkgs/development/compilers/acme/default.nix
@@ -14,6 +14,11 @@ stdenv.mkDerivation rec {
 
   makeFlags = [ "BINDIR=$(out)/bin" ];
 
+  postPatch = ''
+    substituteInPlace Makefile \
+      --replace "= gcc" "?= gcc"
+  '';
+
   meta = with stdenv.lib; {
     description = "A multi-platform cross assembler for 6502/6510/65816 CPUs.";
     homepage = "https://sourceforge.net/projects/acme-crossass/";