diff --git a/automated/run-lts.sh b/automated/run-lts.sh
index 9e86b750..08e67045 100755
--- a/automated/run-lts.sh
+++ b/automated/run-lts.sh
@@ -3,5 +3,5 @@
 cd "$(dirname "${BASH_SOURCE[0]}")"
 
 git pull
-time script -q -c "./build.sh $*" $1-build-$(date -u +%F_%T)
+time script -q -c "./build.sh $*" $1-build-$(date -u +%F_%T).log
 date
diff --git a/automated/run-nightly.sh b/automated/run-nightly.sh
index 12ed6c9b..a3976b45 100755
--- a/automated/run-nightly.sh
+++ b/automated/run-nightly.sh
@@ -9,7 +9,7 @@ esac
 
 while true; do
     git pull
-    time script -q -c "./build.sh nightly-$(date -u +%F) $cmd" nightly-build-$(date -u +%F_%T)
+    time script -q -c "./build.sh nightly-$(date -u +%F) $cmd" nightly-build-$(date -u +%F_%T).log
     ${cmd:+exit 0}
     ${once:+date; exit 0}
     echo "$0: run completed at $(date)"