Can't install the Google Plugin for Eclipse 3.7

I get the following error message when I try to install the Google
Plugin for Eclipse 3.7:

Cannot complete the install because one or more required items could
not be found.
Software currently installed: Shared profile 1.0.0.1308118821836
(SharedProfile_epp.package.java 1.0.0.1308118821836)
Missing requirement: Shared profile 1.0.0.1308118821836
(SharedProfile_epp.package.java 1.0.0.1308118821836) requires
'org.maven.ide.eclipse [1.0.0.20110607-2117]' but it could not be
found

My end goal is to install the Google Web Toolkit 2.4.0 SDK Bundle for
Eclipse 3.7. I'm new to Eclipse and GWT.

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