From ce549c85c8e67892fa23365d70e123e60a94d95b Mon Sep 17 00:00:00 2001
From: Damien Cassou <damien@cassou.me>
Date: Mon, 29 Feb 2016 13:08:12 +0100
Subject: [PATCH] pharo-vm: stop trying to build on darwin

Building these pharo-vm sources on darwin may be possible but doesn't
make much sense because native darwin sources exist.
---
 pkgs/development/pharo/vm/build-vm.nix | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/pharo/vm/build-vm.nix b/pkgs/development/pharo/vm/build-vm.nix
index d18f64c9aba3..3dfe913145ce 100644
--- a/pkgs/development/pharo/vm/build-vm.nix
+++ b/pkgs/development/pharo/vm/build-vm.nix
@@ -88,6 +88,10 @@ stdenv.mkDerivation rec {
     homepage = http://pharo.org;
     license = stdenv.lib.licenses.mit;
     maintainers = [ stdenv.lib.maintainers.DamienCassou ];
-    platforms = stdenv.lib.platforms.mesaPlatforms;
+    # Pharo VM sources are packaged separately for darwin (OS X)
+    platforms = with stdenv.lib;
+                  intersectLists
+                    platforms.mesaPlatforms
+                    (subtractLists platforms.darwin platforms.unix);
   };
 }