diff --git a/repo/prep.sh b/repo/prep.sh
index 5686a9e..e33d72c 100755
--- a/repo/prep.sh
+++ b/repo/prep.sh
@@ -1,4 +1,6 @@
 #! /bin/bash -x
 
+rm -rf /var/lib/apt/lists/*
+apt-get update -o Acquire::CompressionTypes::Order::=gz
 apt-get update
 apt-get dist-upgrade --yes --allow-unauthenticated