Manually install phantomjs

wercker.yml

box: ruby:2.2.3

build:
  steps:
    # uncomment if you use box: ruby:2.2.3-slim
    # - script:
    #     name: install deps
    #     code: |
    #       apt-get update
    #       apt-get install -y wget libfreetype6 libfreetype6-dev libfontconfig1 libfontconfig1-dev build-essential chrpath libssl-dev libxft-dev


    - script:
        name: install phantomjs 1.9.8
        code: |
          cd /tmp
          export PHANTOM_JS="phantomjs-1.9.8-linux-x86_64"
          wget https://bitbucket.org/ariya/phantomjs/downloads/$PHANTOM_JS.tar.bz2
          tar xvjf $PHANTOM_JS.tar.bz2
          mv $PHANTOM_JS /usr/local/share
          ln -sf /usr/local/share/$PHANTOM_JS/bin/phantomjs /usr/local/bin
          # checking if phantomjs works:
          phantomjs --version