diff --git a/templates/borg_exporter.j2 b/templates/borg_exporter.j2
index 15742a1..914dcea 100644
--- a/templates/borg_exporter.j2
+++ b/templates/borg_exporter.j2
@@ -5,7 +5,7 @@ set -eu
 
 TEXTFILE_COLLECTOR_DIR=/var/lib/prometheus/node-exporter
 PROM_FILE=$TEXTFILE_COLLECTOR_DIR/backup.prom
-TMP_FILE=$PROM_FILE.$$
+TMP_FILE=$(mktemp)
 NOW=$(date +%s)
 BORG_INFO=$(borgmatic --no-color info --last 1 --json)