diff --git a/build-tools/build_iso/image.inc b/build-tools/build_iso/image.inc
index 20b371ea..af5f62e3 100644
--- a/build-tools/build_iso/image.inc
+++ b/build-tools/build_iso/image.inc
@@ -42,6 +42,7 @@ smartmontools
 collectd
 puppet-collectd
 socat
+attr
 
 # for realtime kernel
 rtctl