From 5294a0a8a012bb577d075db73f60703b043ce56f Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Fri, 4 Oct 2013 17:11:42 +0200
Subject: [PATCH] Register restarted derivations as GC roots

---
 src/lib/Hydra/Helper/Nix.pm | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/lib/Hydra/Helper/Nix.pm b/src/lib/Hydra/Helper/Nix.pm
index 26742625..3b6afbf9 100644
--- a/src/lib/Hydra/Helper/Nix.pm
+++ b/src/lib/Hydra/Helper/Nix.pm
@@ -575,6 +575,8 @@ sub restartBuilds($$) {
             push @paths, $build->drvpath;
             push @paths, $_->drvpath foreach $build->buildsteps;
 
+            registerRoot $build->drvpath;
+
             $build->update(
                 { finished => 0
                 , busy => 0