Minor fixes
diff --git a/debian-8/scripts/base.sh b/debian-8/scripts/base.sh
index b3995d2..ebb2c95 100644
--- a/debian-8/scripts/base.sh
+++ b/debian-8/scripts/base.sh
@@ -1,6 +1,8 @@
 ## Base packages and setup
+export DEBIAN_FRONTEND=noninteractive
 echo "exit 101" > /usr/sbin/policy-rc.d
 chmod +x /usr/sbin/policy-rc.d
+apt-get clean
 apt-get update
 
 # Cleanup old kernels, ensure latest is installed via virtual package