From fbf0b2fa45c883f1f5e0c8f5397fcf62a4df9207 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Wed, 19 Dec 2012 11:47:42 +0100
Subject: [PATCH] Kill the build hook rather than shutting it down cleanly

Waiting for the hook to shut down cleanly sometimes seems to lead to
hangs.
---
 src/libstore/build.cc | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index ce87eaed2f..08dfbd2840 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -710,13 +710,7 @@ HookInstance::HookInstance()
 HookInstance::~HookInstance()
 {
     try {
-        /* Cleanly shut down the hook by closing its stdin if it's not
-           already building.  Otherwise pid's destructor will kill
-           it. */
-        if (pid != -1 && toHook.writeSide != -1) {
-            toHook.writeSide.close();
-            pid.wait(true);
-        }
+        pid.kill();
     } catch (...) {
         ignoreException();
     }