Change effective on 04 January 2015
Heroku’s support for Play 1.x applications has introduced the ability to customize Ivy execution by providing an
ivysettings.xml file to the build. To use this feature, create a
.ivy2-overlay directory in the root of your project. Put your
ivysettings.xml file in this directory, and add it to your Git repository. The contents of the
.ivy2-overlay directory will be copied over the default
.ivy2 directory at compile time.