gentoo-overlay/games-board/tablebase-syzygy/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
<maintainer type="person">
  <email>ulm@gentoo.org</email>
</maintainer>
<use>
  <flag name="6-pieces">Install tablebases for 6 pieces (huge!)</flag>
</use>
</pkgmetadata>