137/376: Reduce verbosity

[Ludovic Court�s]

civodul pushed a commit to tag 1.8
in repository guix.

commit c160ead82f6a36b5a3efbb36241e567d1e2388cc
Author: Eelco Dolstra <eelco.dols...@logicblox.com>
Date:   Sun Aug 17 19:11:50 2014 +0200

    Reduce verbosity
---
 src/libstore/build.cc |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index ad450a9..2e38755 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -1439,7 +1439,8 @@ void DerivationGoal::buildDone()
         outputLocks.unlock();
 
     } catch (BuildError & e) {
-        printMsg(lvlError, e.msg());
+        if (!hook)
+            printMsg(lvlError, e.msg());
         outputLocks.unlock();
         buildUser.release();