Assembly plugin >= 2.5 thinks my group ID is too big

My OS X user's primary group ID is quite large, around 110075129.

Up until assembly 2.4.1, I have had no troubles. However, in 2.5, I get this error when trying to create an assembly:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-assembly-plugin:2.5:single (assemble-command-line) on project crypto-monster: Execution assemble-command-line of goal org.apache.maven.plugins:maven-assembly-plugin:2.5:single failed: group id '110075129' is too big ( > 2097151 ) -> [Help 1]

I am using JDK 7 to build. Have not tested with 8.

I have noticed that the error seems to be specific to assembly of a .tar.gz artifact. Assembling a .zip file does not cause this error.