cache pip correctly

graingert · graingert · commit 2cfa41948e7e · 2015-11-25T12:09:06.000Z
travis auto pip cache is disabled if the install command is changed
diff --git a/.travis.yml b/.travis.yml
@@ -2,7 +2,9 @@ sudo: false
 language: python
 python: "3.5"
 
-cache: pip
+cache:
+  directories:
+    - $HOME/.cache/pip
 install:
     - pip install tox
 
