Build deps fix (#74)

penguinolog · web-flow · commit ccdc33d3f584 · 2018-09-05T10:42:56.000+02:00
* build wheels requires docker service
diff --git a/.travis.yml b/.travis.yml
@@ -42,7 +42,8 @@ jobs:
     if: tag IS present
     # Run on pypy to build not cythonized wheel
     python: *pypy
-    services: []
+    services:
+    - docker
     install:
     - *upgrade_python_toolset
     script:
