Not able to install aws toolkint using the default repo in maven

[jimmybirrias]

Currently I have a eclipse build maven project based on tycho in my plugins there are some dependencies to com.amazonaws.eclipse.ec2, here is my repository configuration:

<repository>
       <id>aws</id>
	<url>http://aws.amazon.com/eclipse/</url>
	<layout>p2</layout>
</repository>

But when I try to run mvn clean install I got the following stack trace:

[INFO] Adding repository http://aws.amazon.com/eclipse
[INFO] Fetching site.xml from http://aws.amazon.com/eclipse/ (118.62kB)
[ERROR] Partial IU: com.amazonaws.eclipse.codestar
[ERROR] Partial IU: com.amazonaws.eclipse.simpledb
[ERROR] Partial IU: com.amazonaws.eclipse.cloudformation
[ERROR] Partial IU: com.amazonaws.eclipse.elasticbeanstalk

And this Exception:
Caused by: org.eclipse.equinox.p2.core.ProvisionException: The p2 repository at http://aws.amazon.com/eclipse contains partial IUs (see above) from an old style update site which cannot be used for dependency resolution

But if I use the same url (http://aws.amazon.com/eclipse/) directly in Eclipse (Help > Install new software...) the plugins are resolved, my question here is which is the correct url to use in maven?
Thanks