update apt repos before using apt
diff --git a/cloudlab-setup.yml b/cloudlab-setup.yml
index d6a98c5..227a333 100644
--- a/cloudlab-setup.yml
+++ b/cloudlab-setup.yml
@@ -5,6 +5,8 @@
   sudo: yes
   tasks:
 
+  - apt: update_cache=yes
+
   - apt: name={{ item }}
     with_items:
     - python-pycurl