M1: If using JAR override, new sources feature does not work.

I'm using SNMP4J, version 1.7.2. This project does not currently reside in any public repositories, so we have it in a 'lib' directory in our SCM and use a jar override to pick it up. I downloaded the source for it and placed it in my local repository. When I run "maven eclipse", it never even attempts to look for this source. Seems like overridden dependencies are ignored.