From 7d4a7136dba7ceb3d5b080b092eb76d23e2bb549 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Thu, 31 Aug 2017 12:52:07 +0200
Subject: [PATCH] More macOS build fixes

---
 src/nix/run.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/nix/run.cc b/src/nix/run.cc
index fcde540fc..f016b04a1 100644
--- a/src/nix/run.cc
+++ b/src/nix/run.cc
@@ -16,6 +16,8 @@ using namespace nix;
 
 std::string chrootHelperName = "__run_in_chroot";
 
+extern char * * environ;
+
 struct CmdRun : InstallablesCommand
 {
     Strings command = { "bash" };
@@ -85,7 +87,7 @@ struct CmdRun : InstallablesCommand
                 if (s) kept[var] = s;
             }
 
-            clearenv();
+            environ = nullptr;
 
             for (auto & var : kept)
                 setenv(var.first.c_str(), var.second.c_str(), 1);