gentoo-overlay/sys-libs/timezone-data/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <maintainer type="project">
    <email>toolchain@gentoo.org</email>
    <name>Gentoo Toolchain Project</name>
  </maintainer>
  <use>
    <flag name="leaps-timezone">
      Install the set of "right" timezones; these timezones include leap seconds
      when counting seconds since the epoch (while POSIX does not) as they are
      based on the TAI (International Atomic Time) clock
    </flag>
    <flag name="zic-slim">
      Default to 'slim' file format for /usr/share/zoneinfo. Otherwise 'fat' format
      is used. Not all programs can handle 'slim' format'.
    </flag>
  </use>
  <upstream>
    <remote-id type="github">eggert/tz</remote-id>
  </upstream>
</pkgmetadata>