Error on copy dependencies using Assembler Plugin (m2e Eclipse Plugin Workspace Resolution)

If you have two projects, with one (B) depending on another (A), and in your assembly.xml file you define the following dependencySet:

<dependencySet>
	<outputDirectory>lib/</outputDirectory>
	<scope>runtime</scope>
	<useProjectArtifact>false</useProjectArtifact>
	<useTransitiveDependencies>true</useTransitiveDependencies>
</dependencySet>

And the workspace resolution been activated, during the package phase an error will occur showing that is not possible to copy the "target/classes" file from project A. Because "target/classes" isn't a file. This error only occurs if the workspace resolution is enabled.