Android : How to make Roboguice 3.0 jar from sources

I need to migrate from roboguice 2.0 to 3.0 in order to use the fragments from API 14 instead of the ones from support v4 library. I've seen that on github there is a release for 3.0 https://github.com/roboguice/roboguice/releases/tag/roboguice-3.0, but with the sources, not the jar. On http://repo1.maven.org/maven2/org/roboguice/roboguice/ I see that the last jar is 3.0-alpha-2, from May 2014. My question is how to make a jar from the sources from github? Sorry if it's a silly question