UriFormatException with BuildPipeline.BuildPlayer

[kyubuns]

BuildPipeline.BuildPlayer(levels, "xcode_project", BuildTarget.iPhone, BuildOptions.None);

This code causes the following error:

UriFormatException: Invalid URI: The format of the URI could not be determined: xcode_project/.

System.Uri rootURI = new System.Uri( ( projectRootPath + "/." ) );
in XCodeEditor/XCProject.cs

check this:
Everyplay/everyplay-ios-sdk#20

Unity 4.5.0f6
OS X 10.9.2
XCode 5.1.1

[kyubuns]

string dstPath = Application.dataPath.Substring(0, Application.dataPath.IndexOf("Assets"));
dstPath = System.IO.Path.Combine(dstPath, "xcode_project");
BuildPipeline.BuildPlayer(levels, dstPath, BuildTarget.iPhone, BuildOptions.None);

This code succeeds.