Mercurial Eclipse fresh install not working Someone dropped the ball on this one, yes the solution is obvious once it's obvious - but until then you will be pulling your hair out. After all you did just install the Mercurial Eclipse plugin from Eclipse Marketplace so it should just work? Well it didn't for me and neither did trying the latest snapshot builds - when restarting Eclipse I kept getting: The cause of this error is that there is no actual built in mercruial support in the plugin so one must have `hg` installed natively. The solution is to go to Mercurial download page , run the setup, and then restart your eclipse. If this has helped you feel free to follow me on Google+ or on twitter @danielsokolow or just say hello.