From 538684d0c42fdedfbd660840d3e66c783c9006ef Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Mon, 24 Aug 2015 11:13:31 +0200
Subject: daemon: Prevent .chroot from being GC'ed when using
 LocalStore::buildDerivation()

Fixes #616.
---
 nix/libstore/build.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/nix/libstore/build.cc b/nix/libstore/build.cc
index efe1ab2b17..ab33f57265 100644
--- a/nix/libstore/build.cc
+++ b/nix/libstore/build.cc
@@ -882,6 +882,10 @@ DerivationGoal::DerivationGoal(const Path & drvPath, const StringSet & wantedOut
     state = &DerivationGoal::init;
     name = (format("building of `%1%'") % drvPath).str();
     trace("created");
+
+    /* Prevent the .chroot directory from being
+       garbage-collected. (See isActiveTempFile() in gc.cc.) */
+    worker.store.addTempRoot(drvPath);
 }
 
 
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