Did I screw up travis? Let's see if I can make it start running again

.travis.yml

 language: python
 sudo: false
-cache:
-  pip
-  directories:
-    - eggs
 matrix:
     include:
         - os: linux
@@ -28,7 +24,7 @@ matrix:
           python: 3.5
           env: ZEO4_SERVER=1
 install:
-    - pip install -U zc.buildout
+    - pip install zc.buildout
     - buildout
 script:
     - bin/test -v1j99