Hot to get Gradle running with elastic bamboo agent?

I am struggling a little bit to get Gradle running with Elastic Bamboo. I would install Gradle on our mounted EBS-Snapshot. Then take a new one and afterwards add this as Executable capability to the elastic image config. Is this enough? Since normally (like this guide: http://ift.tt/1DnxShk) you would also manipulate your profile - but this is located on the ephemeral EBS of the image...