From b8d488ab938ee7c2b32c84e72e46573e85c1223b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <vcunat@gmail.com>
Date: Fri, 5 Feb 2016 19:09:01 +0100
Subject: [PATCH] asymptote: fix tarball by asserting isLinux

We have no osmesa on darwin, which caused an evaluation error.
---
 pkgs/tools/graphics/asymptote/default.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/tools/graphics/asymptote/default.nix b/pkgs/tools/graphics/asymptote/default.nix
index 9199d6a038f..c28349a31cc 100644
--- a/pkgs/tools/graphics/asymptote/default.nix
+++ b/pkgs/tools/graphics/asymptote/default.nix
@@ -3,6 +3,9 @@
   , boehmgc, mesa_glu, mesa_noglu, ncurses, readline, gsl, libsigsegv
   , python, zlib, perl, texLive, texinfo, xz
 }:
+
+assert stdenv.isLinux;
+
 let
   s = # Generated upstream information
   rec {