Cannot build a project locally

I cannot build a project locally with `mvn clean install`. It is related to "gremlin-shaded" module. When maven tries to compile gremlin-core module, it looks at gremlin-shaded/target/classes instead of the local repository, for some reason.

I managed to work-around this by commenting-out `<module>gremlin-shaded</module>` line in the root pom after building gremlin-shaded, but this is an ugly solution.