I have installed m2eclipse plugin from http://m2eclipse.codehaus.org/. Now I want to use that as a standalone build tool but I am unable to find the installation directory. Can
My Eclipse is using a Default Maven Version (3.0.4). So try this:
Option 1: Restart Restart your Eclipse and look if the Maven configuration is right again under "Windows" -> "Preferences" -> "Maven" -> "Installations"
Option 2: Select/Configure your Embedded "Maven Runtime" Right-click on your project -> "Run As..." -> under "Maven Build", Tab "Main" -> take the "External" Maven in the Drop-Down Box. Then run it.