title: Can't connect to docker from docker-compose
body: <p>I installed docker-machine 0.1.0 and docker-compose 1.1.0 on Mac OS 10.8.5.<br />Docker-machine is running normally and able to connect by docker-machine ssh.</p>
  
  <pre><code>$ docker-machine ls
  NAME   ACTIVE   DRIVER       STATE     URL                         SWARM
  dev    *        virtualbox   Running   tcp://192.168.99.100:2376   
  </code></pre>
  
  <p>However can't connect from docker-compose.</p>
  
  <pre><code>$ docker-compose up
  </code></pre>
  
  <blockquote>
    <p>Couldn't connect to Docker daemon at http+unix://var/run/docker.sock - is it running?</p>
    
    <p>If it's at a non-standard location, specify the URL with the DOCKER_HOST environment variable.</p>
  </blockquote>
  
  <p>My Dockerfile and docker-compose.yml is here.</p>
  
  <p>Dockerfile</p>
  
  <pre><code>FROM centos:centos7
  DOCKER_HOST tcp://192.168.99.100:2376
  </code></pre>
  
  <p>docker-compose.yml</p>
  
  <pre><code>web:
    build: .
  </code></pre>
  
  <p>Why can't connect? Any ideas?</p>