Maven extensions like os-maven-plugin are not taken into account when building the effective pom

os-maven-plugin is a Maven extension which inject system properties related to the current system, which are then resolved when generating the effective pom.

Unfortunately, Extension Manager does not execute Maven extension right now, which means that those system properties are not injected, and those variable are not resolved.

For example, this is often used to indicate as a dependency classifier a specific system corresponding to the current one.