diff --git a/definitions/Debian-jessie-amd64-netboot/cleanup.sh b/definitions/Debian-jessie-amd64-netboot/cleanup.sh
index f6953e1..d24e50e 100644
--- a/definitions/Debian-jessie-amd64-netboot/cleanup.sh
+++ b/definitions/Debian-jessie-amd64-netboot/cleanup.sh
@@ -1,5 +1,5 @@
 # Clean up
-apt-get -y remove linux-headers-$(uname -r) build-essential
+#apt-get -y remove linux-headers-$(uname -r) build-essential
 apt-get -y autoremove
 apt-get -y clean
 
@@ -9,8 +9,7 @@ rm /var/lib/dhcp/*
 
 # Make sure Udev doesn't block our network
 echo "cleaning up udev rules"
-rm /etc/udev/rules.d/70-persistent-net.rules
-mkdir /etc/udev/rules.d/70-persistent-net.rules
+echo -n > /etc/udev/rules.d/70-persistent-net.rules
 rm -rf /dev/.udev/
 rm /lib/udev/rules.d/75-persistent-net-generator.rules