diff --git a/lib/functions/rootfs/apt-install.sh b/lib/functions/rootfs/apt-install.sh
index 59ed5e4fe1..dc684d0c61 100644
--- a/lib/functions/rootfs/apt-install.sh
+++ b/lib/functions/rootfs/apt-install.sh
@@ -11,6 +11,9 @@ function apt_purge_unneeded_packages() {
 	# remove packages that are no longer needed. rootfs cache + uninstall might have leftovers.
 	display_alert "No longer needed packages" "purge" "info"
 	chroot_sdcard_apt_get autoremove
+	# clean apt cache
+	display_alert "No longer needed apt cache" "purge" "info"
+	chroot_sdcard_apt_get clean
 }
 
 # this is called: