Review fixes #8.

Author: SudoBobo

.travis.yml

@@ -28,11 +28,8 @@ script:
   - |
     if [ -n "${OS}" ]; then
         git clone https://github.com/packpack/packpack.git
+        ls -a $HOME/.cache/packpack
         packpack/packpack
-        pwd
-        ls
-        ls build
-        ls -a $HOME/.cache
     else
         ./tools/ubuntu.trusty.test.sh
     fi;