The NWN dedicated server build process requires an unzip command to work. When I first tried to emerge nwn-ded, I didn't have unzip installed, so it failed. Emerging unzip solved the problem. Reproducible: Always Steps to Reproduce: 1. 2. 3.
The ebuild I've attached to bug #51778 has a DEPEND for unzip.
Fixed in CVS. Thanks for the bug report.