Flatcar is a Linux distribution for running container workloads that was originally derived from CoreOS, ChromiumOS, and Gentoo. Today, its maintainers not only draw directly from Gentoo, but also contribute directly back to Gentoo as well. Come and learn about how this relationship has evolved, how we've already benefited from each other's work, and what we plan to work on next. This ever-growing synergy has even led to us sharing a stand together at FOSDEM this year.