Fixing travis

tox.ini

@@ -2,14 +2,12 @@
 envlist = py27, flake8
 
 [testenv]
-sitepackages = true
 deps =
     mock
     mopidy
     pytest
     pytest-cov
     pytest-xdist
-install_command = pip install {opts} {packages}
 commands =
     py.test \
         --basetemp={envtmpdir} \
@@ -21,4 +19,5 @@ commands =
 deps =
     flake8
     flake8-import-order
+skip_install = true
 commands = flake8