When copying dependencies I want to exclude artifacts that are also reactor projects

I have a top level reactor pom with the following declaration, but also a local reactor project with the same identity. When copying dependencies, I want to exclude these jar files since they will duplicate classes generated in the maven target/classes folder of the local reactor project. The purpose is for creating jvm classpaths without duplicate classes.

<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.my.company</groupId>
<artifactId>reactor-project</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
</dependencies>
</dependencyManagement>