diff --git a/pika-sources/debian/preinst b/pika-sources/debian/preinst
index c119ef1..a1ce37f 100644
--- a/pika-sources/debian/preinst
+++ b/pika-sources/debian/preinst
@@ -2,5 +2,5 @@
 
 set -e
 
-rm -rf /etc/apt/sources.list.d/pika-*|| true
+rm -rf /etc/apt/sources.list.d/pika-* || true
 rm -rf /etc/apt/preferences.d/*pika* || true