Not a v4.0.0 POM

I have a maven 1 project that builds a jar file called pps-3.0.2.jar.
The jar (and it's pom) are moved into my legacy style repository.

I have a maven 2 project that depends on pps-3.0.2. It compiles and
tests the code fine. During the assembly it is suppose to creates a
directory of dependent jar files and it blows up with the message:
----------------------------------------------------------------------
Error building POM (may not be this project's POM).

Project ID: ebs:pps
POM Location: /home/chelck/.m2/repository/ebs/pps/3.0.2/pps-3.0.2.pom

Reason: Not a v4.0.0 POM.
-------------------------------------------------------------------------
In a sense the error is correct: pps-3.0.2.pom is not v4.0.0 – it's
legacy. So why is mvn trying to build it's POM and why doesn't it
realize it's a legacy pom?

I see this with maven 2.0.4,2.0.6, and 2.0.7.

Here is a (2.0.4) stack trace:

[DEBUG] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to create assembly: Error retrieving POM of module-dependency: ebs:pps:jar:3.0.2; Reason: Not a v4.0.0 POM.
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:559)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:475)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:454)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:306)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:273)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:140)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:322)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:115)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:256)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
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)
Caused by: org.apache.maven.plugin.MojoExecutionException: Failed to create assembly: Error retrieving POM of module-dependency: ebs:pps:jar:3.0.2; Reason: Not a v4.0.0 POM.
at org.apache.maven.plugin.assembly.mojos.AbstractAssemblyMojo.execute(AbstractAssemblyMojo.java:302)
at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:412)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:534)
... 16 more
Caused by: org.apache.maven.plugin.assembly.archive.ArchiveCreationException: Error retrieving POM of module-dependency: ebs:pps:jar:3.0.2; Reason: Not a v4.0.0 POM.
at org.apache.maven.plugin.assembly.archive.task.AddDependencySetsTask.addDependencySet(AddDependencySetsTask.java:114)
at org.apache.maven.plugin.assembly.archive.task.AddDependencySetsTask.execute(AddDependencySetsTask.java:90)
at org.apache.maven.plugin.assembly.archive.phase.DependencySetAssemblyPhase.execute(DependencySetAssemblyPhase.java:54)
at org.apache.maven.plugin.assembly.archive.DefaultAssemblyArchiver.createArchive(DefaultAssemblyArchiver.java:98)
at org.apache.maven.plugin.assembly.mojos.AbstractAssemblyMojo.execute(AbstractAssemblyMojo.java:278)
... 18 more
Caused by: org.apache.maven.project.InvalidProjectModelException: Not a v4.0.0 POM.
at org.apache.maven.project.DefaultMavenProjectBuilder.readModel(DefaultMavenProjectBuilder.java:1299)
at org.apache.maven.project.DefaultMavenProjectBuilder.readModel(DefaultMavenProjectBuilder.java:1270)
at org.apache.maven.project.DefaultMavenProjectBuilder.findModelFromRepository(DefaultMavenProjectBuilder.java:471)
at org.apache.maven.project.DefaultMavenProjectBuilder.buildFromRepository(DefaultMavenProjectBuilder.java:225)
at org.apache.maven.project.DefaultMavenProjectBuilder.buildFromRepository(DefaultMavenProjectBuilder.java:235)
at org.apache.maven.plugin.assembly.archive.task.AddDependencySetsTask.addDependencySet(AddDependencySetsTask.java:109)
... 22 more