I'm reporting this bug because your package is currently using static linking on at least part of the files it installs: Now, while there are packages for which the static linking is mandatory, if it's just that it's desired, you should make it optional via USE flag default for +static with EAPI=1. Static linking _may_ be a security issue, thus shouldn't be forced on. If your package is actually a prebuilt or proprietary package, you should install in /opt instead.
xstow 1.0.0 has been released. It allows you to choose whether to build statically. I've passed on a xstow-1.0.0.ebuild which respects USE=static to my proxy committer. When it is included into portage this bug may be closed.
1.0.0 finally added to tree with static USE flag.