title: Why does fastlanes increment_build_number not find my project?
body: <p>I've moved my fastlane folder out of the xcode directory, so I'm trying to get it to target it. I have this is my Fastfile:</p>
  
  <pre><code>increment_build_number(
    xcodeproj: "../ember-cordova/cordova/platforms/ios/Patontheback.xcodeproj",
    build_number: ENV['CIRCLE_BUILD_NUM']
  )
  </code></pre>
  
  <p>Which gives</p>
  
  <pre><code>[06:50:47]: ------------------------------------
  [06:50:47]: --- Step: increment_build_number ---
  [06:50:47]: ------------------------------------
  [06:50:47]: Error setting value '../ember-cordova/cordova/platforms/ios/Patontheback.xcodeproj' for option 'xcodeproj'
  [06:50:47]: You passed invalid parameters to 'increment_build_number'.
  [06:50:47]: Check out the error below and available options by running `fastlane action increment_build_number`
  [06:50:47]: Variable Dump:
  [06:50:47]: {:DEFAULT_PLATFORM=&gt;:ios, :PLATFORM_NAME=&gt;:ios, :LANE_NAME=&gt;"ios beta", :SIGH_PROFILE_TYPE=&gt;"app-store"}
  [06:50:47]: Could not find Xcode project
  </code></pre>
  
  <p>xcodeproj definitely exists in that location:</p>
  
  <pre><code>$ ls -l ../ember-cordova/cordova/platforms/ios/Patontheback.xcodeproj
  total 28
  -rwxr-xr-x 1 kitsunde staff 25639 Sep 23 02:57 project.pbxproj
  </code></pre>
  
  <p>What am I doing wrong?</p>