def include_in(self, dist):
        """Ensure feature and its requirements are included in distribution

        You may override this in a subclass to perform additional operations on
        the distribution.  Note that this method may be called more than once
        per feature, and so should be idempotent.

        """

        if not self.available:
            raise DistutilsPlatformError(
                self.description + " is required, "
                "but is not available on this platform"
            )

        dist.include(**self.extras)

        for f in self.require_features:
            dist.include_feature(f)