Mutability Detector maven build issue (maven plugin version issue) - although error message does not mention this clearly!

gistfile1.txt

[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Building MutabilityDetector
[INFO]    task-segment: [clean, package]
[INFO] ------------------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[ERROR] FATAL ERROR
[INFO] ------------------------------------------------------------------------
[INFO] The plugin descriptor for the plugin Plugin [org.apache.maven.plugins:maven-compiler-plugin] was not found. Please verify that the plugin JAR C:\Users\User\.m2\repository\org\apache\maven\plugins\maven-compiler-plugin\2.0.2\maven-compiler-plugin-2.0.2.jar is intact.
[INFO] ------------------------------------------------------------------------
[INFO] Trace
java.lang.IllegalStateException: The plugin descriptor for the plugin Plugin [org.apache.maven.plugins:maven-compiler-plugin] was not found. Please verify that the plugin JAR C:\Users\User\.m2\repository\org\apache\maven\plugins\maven-compiler-plugin\2.0.2\maven-compiler-plugin-2.0.2.jar is intact.
  at org.apache.maven.plugin.DefaultPluginManager.addPlugin(DefaultPluginManager.java:360)
  at org.apache.maven.plugin.DefaultPluginManager.verifyVersionedPlugin(DefaultPluginManager.java:224)
	at org.apache.maven.plugin.DefaultPluginManager.verifyPlugin(DefaultPluginManager.java:184)
	at org.apache.maven.plugin.DefaultPluginManager.loadPluginDescriptor(DefaultPluginManager.java:1642)
	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.verifyPlugin(DefaultLifecycleExecutor.java:1540)
	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.bindPluginToLifecycle(DefaultLifecycleExecutor.java:1503)
	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.constructLifecycleMappings(DefaultLifecycleExecutor.java:1282)
	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:534)
	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
	at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
	at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
	at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
	at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
	at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
	at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1 second
[INFO] Finished at: Thu Dec 27 00:10:58 GMT 2012
[INFO] Final Memory: 7M/112M
[INFO] ------------------------------------------------------------------------