From 24ec7500032c2434e450b7bc3f77ff4c1f12c41c Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Mon, 26 Feb 2018 18:29:40 +0100
Subject: nix run: Fix segfault on macOS

Note that clearenv() is not available on macOS.

Fixes #1907.
---
 src/nix/run.cc | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

(limited to 'src/nix/run.cc')

diff --git a/src/nix/run.cc b/src/nix/run.cc
index 822654daf488..d04e106e037b 100644
--- a/src/nix/run.cc
+++ b/src/nix/run.cc
@@ -16,8 +16,6 @@ using namespace nix;
 
 std::string chrootHelperName = "__run_in_chroot";
 
-extern char * * environ;
-
 struct CmdRun : InstallablesCommand
 {
     std::vector<std::string> command = { "bash" };
@@ -109,7 +107,7 @@ struct CmdRun : InstallablesCommand
                 if (s) kept[var] = s;
             }
 
-            environ = nullptr;
+            clearEnv();
 
             for (auto & var : kept)
                 setenv(var.first.c_str(), var.second.c_str(), 1);
-- 
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