From 20d059892819d2f06f4da8c1150c91e16df1f8cd Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Thu, 6 Feb 2014 13:51:57 +0100
Subject: [PATCH] =?UTF-8?q?Drop=20dependency=20on=20=E2=80=98expr=E2=80=99?=
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http://hydra.nixos.org/build/8715639

Not sure why this causes a failure now.
---
 tests/parallel.builder.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tests/parallel.builder.sh b/tests/parallel.builder.sh
index 280eb1de8..d092bc5a6 100644
--- a/tests/parallel.builder.sh
+++ b/tests/parallel.builder.sh
@@ -7,7 +7,7 @@ while ! ln -s x $shared.lock 2> /dev/null; do
 done
 test -f $shared.cur || echo 0 > $shared.cur
 test -f $shared.max || echo 0 > $shared.max
-new=$(expr $(cat $shared.cur) + 1)
+new=$(($(cat $shared.cur) + 1))
 if test $new -gt $(cat $shared.max); then
     echo $new > $shared.max
 fi
@@ -25,5 +25,5 @@ while ! ln -s x $shared.lock 2> /dev/null; do
     sleep 1
 done
 test -f $shared.cur || echo 0 > $shared.cur
-echo $(expr $(cat $shared.cur) - 1) > $shared.cur
+echo $(($(cat $shared.cur) - 1)) > $shared.cur
 rm $shared.lock