/usr/share/maven-repo/org/codehaus/plexus/plexus-archiver/1.0-alpha-12/plexus-archiver-1.0-alpha-12.jar is in libplexus-archiver-java 1.0~alpha12-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/maven-repo/org/codehaus/plexus/plexus-archiver/1.0-alpha-12/../../../../../../java/plexus-archiver-1.0-alpha-12.jar