Eclipse error "File does not exist for external tool Maven_Ant_Builde"

I just downloaded a project from Github and imported it into Eclipse.

I just want to compile it now. However, the build error for the error above. I'm not a big fan of Java compilation tools, but the error message tells me that I am missing something on my system :)

Errors occurred during the build.
Errors running builder 'Integrated External Tool Builder' on project 'projectname'.
The file does not exist for the external tool named Maven_Ant_Builder.
The file does not exist for the external tool named Maven_Ant_Builder.

      

        
        
        
      

    

Launch zypper se maven

reported no packages to install. I already have itant

What should I install on my system in order to compile this project?