Intellij IDEA will not automatically do a make install when you do a Build Project. In order to do that, proceed as follows:
Under Maven Projects tab (usually on the right hand side), select the goals you want Intellij to run after a Build -> Make Project and then right click and select the trigger (for instance in the above snapshot, the trigger was chosen as ‘Execute After Make’. You can choose whatever you wish).
After doing this a Build -> Make Project will run a mvn clean install as well.