gentoo-overlay/app-arch/wimlib/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <!-- maintainer-needed -->
  <use>
    <flag name="fuse">
      Use fuse libraries
    </flag>
    <flag name="iso">
      Install app-cdr/cdrtools in order to prepare iso images
    </flag>
    <flag name="ntfs">
      Use libntfs-3g library from sys-fs/ntfs3g
    </flag>
    <flag name="openssl">
      Use the SHA-1 message digest from libcrypto instead of compilling another implementation
    </flag>
    <flag name="yasm">
      Use yasm assembler instead of nasm
    </flag>
  </use>
</pkgmetadata>